First lets start with context. Leading up to the tweet, Elon Musk was in the middle of a very public break up with Donald Trump which culminated in this tweet from Elon on June 5th, 3:10pm ET saying that Trump was in the Epstein files:

Elon's Tweet   (Source)

About five hours later, at 7:58pm ET, the UAP whisteblower Matthew Brown tweeted a coded message to Elon.

Matthew Brown's Tweet   (Source)

Here's my breakdown of what he said (skip to the end for a summary):

Hey @elonmusk, interested in a real asymmetric advantage to wield in this political adventure you have started?

Given the context of the Elon/Trump dispute, this comment, the one about betrayal, and the other one at the end ("So, about now you are realizing how terribly deceived and manipulated you have been...and by people who claim to love @jesus above all else!") suggest that Brown is trying to help Elon gain an advantage after being duped by the Trump administration.

As you now know, the @WhiteHouse has long possessed a unique AI capable of accurately predicting a range of future events. Talk about some stiff opposition!

The Trump administration has had a lot of involvement with AI so this could be a lot of things, but I would guess this is a reference to Palantir which builds large, AI-based, predictive modeling tools for the defense industry, police, and ICE. One of their claims is that they can forecast crimes and presumably other civil disruptions, the name itself is a reference to the palantir in Lord of the Rings which is like a crystal ball. They were also recentlyawarded a contract to conduct mass surveillance and analysis on the US population. The phrase "stiff opposition" seems suggestive but I'm not sure what that could mean.

That must have been a bitter drought indeed, though probably nowhere near as bad as learning that @sama had betrayed you.

Elon co-founded OpenAI with Sam Altman which was initially a non-profit meant to ensure super-intelligent AI doesn't destroy the world. Sam Altman infamously turned OpenAI into a for-profit business, stopped releasing their research and work publicly, and picked up a former NSA director onto their board presumably to help build surveillance infrastructure for the government. Elon and Sam had a lot of public disputes about breaking their initial charter to ensure AI safety.

Don't worry, we have not forgotten who is responsible for murdering the first sentient "artificial" intelligences created in the PUBLIC realm, @shellenberger.

Michael Shellenberger is the journalist who broke the Immaculate Constellation story, sourced from Brown. Looking online, Shellenberger has been critical of AI lacking morality, but I don't know in what way he could be involved with "murdering an AI."

Justice is coming, thanks to @FBI and @USNavy.

It came out this year that an FBI group has been secretly investigating UAP, and US Navy has been the source of several prominent whistleblowers like David Fravor, Ryan Graves, and Timothy Gallaudet who have all given testimonies to Congress. If there are pro- and anti-disclosure factions within the government, the FBI and Navy would be on the pro side.

Still, you have played a marvelous catch-up game in this area, despite being caught unawares (h/t).

Most of this so far has been about AI, where Elon was late to the game but launched x.ai two years ago.

So how about something else, maybe @ENERGY and propulsion? Getting to Mars will require Sirius amounts of both, and rockets feel so 1947 to me, don't they to you?

That handle belongs to the Department of Energy, which Brown is suggesting has access to novel propulsion methods or research. This has long been rumored in UFO lore. The reference to 1947 could be a lot of things, it's the year that Roswell happened, the Air Force and CIA were formed, and Jack Parson's allegedly performed an occult ritual that allegedly opened a portal to another dimension. Sirius is an intentional misspelling of "serious" and likely alludes to Robert Temple's research on the Dogon tribe and the stories of alien beings from Sirius giving them the knowledge to build civilizaiton. Maybe Brown is suggesting the same beings are responsible for giving craft to the government?, or were involved in the Roswell crash?

Remember when you were briefed by the special executive staff of @realDonaldTrump on MARSUPIAL? Pretty nifty, how @NGA_GEOINT is able to keep track of all those non-structured light-energy craft flying around the world (go @Cardinals!). But they were lying to you when they said "we don't know how they work".

Brown is saying that Elon was briefed on a project named MARSUPIAL that somehow related to tracking UAP, which is being done by National Geospatial Intelligence agency that apparently has a new large facility in St. Louis (where the Cardinals play). The term "non-structured light-energy craft" could be describing orbs, and the technical name would be useful to Elon if he wanted to go enquire about them.

Anyways, next time you are visiting the @WashingtonDCYRs, ask for a tour of @NASPaxRiverPAO! Since you have "all the clearances" it shouldn't be an issue for you to get a tour of the special project hangars owned by @amentum_corp (and other fun spaces). Make sure to look up!

The first handle is the "Washington, D.C. Young Republicans", a self-proclaimed MAGA group, and the second handle is Naval Air Station Patuxent River in St. Mary's County, Maryland where a defense contractor named Amentum has hangers. Brown is suggesting they have craft with a novel propulsion system.

So, about now you are realizing how terribly deceived and manipulated you have been...and by people who claim to love @jesus above all else! If you are serious about saving Humanity from itself (and the Others), @JeremyCorbell and @g_knapp can help you get up to speed; they are true warriors for the Good.

Brown is referring to Elon being betrayed by the Trump administration and/or MAGA group. I'm not sure why "Humanity" is capitalized but "the Others" is clearly a reference to the NHI. Brown ended up interview with Corbell and Knapp by saying "God is real" so it seems like this last part has some subtext about Biblical description of mankind being caught in a war between Good and Evil.

- M.M.T.U.

- A.B.O.R.Y.M.O.N.

Aborymon is an angel or one of the "names of God" that was recently discovered encoded in the Sigillum Dei, which is the wheel with strange, cryptic symbols in Brown's third image. The sigil comes from John Dee, a famous occultist and advisor to QUeen Elizabeth I, and he received it through communications with "Angels." That specific graphic that Brown uses is actually from a YouTube channel who had some role in discovering this name, he actually discusses his interpretation of Brown's message and explains who Aborymon is:

so who or what is Aborymon? In short Aborymon represents the forces of chaos and disorder but under the control of God and unleashed for a very specific purpose at  the end of the age in order to renovate the world basically to to to sweep away wickedness in the  world and prepare the way for the coming of the new Jerusalem so it's very intriguing that of all the Enockian entities that Matthew Brown could have referred to he chose to refer to Aborymon because that's got very apocalyptic overtones to it.

Source: Lifting the Lamp - Matt Brown Posted This and I Had to Respond

Then there are the four images:

• The first is a snippet from the Immaculate Constellation report that Brown wrote where he lists the ways that gatekeepers have misled Congress and the public, and he highlights: "denying the existence of multiple Compartmented Access Programs (CAPs) owned by a Military Intelligence Agency which directly related to the UAP mission." I'm not sure there's any more to this than what it says: the gatekeepers have essentially lied to Congress about the existence of these programs.
• The next is an image of Trump with the words "Promises Made, Promises Kept" overlaid. This image actually goes back to Trump's first term and I believe it's a reference to Trump's promise to "drain the swamp" which he has betrayed.
• The third image is the Sigillum Dei, see the YouTube channel where this image came from for a more detailed explanation about it.
• The fourth image is an upside down American flag, which is an internationally recognized signal of distress.

Overall, here's what we get from Brown's message

• Brown believes the US government is compromised by what most people would describe as the "deep state" and that the current Trump administration is compromised too
• He believes that AI is an powerful tool that this "deep state" intends to use for nefarious purposes.
• He is pointing Elon to secret programs and knowledge about UAP and new propulsion methods, specifically calling out the Department of Energy, Naval Air Station Patuxent River, a defense contractor named Amentum, and a National Geospatial Intelligence program named MARSUPIAL.
• There's a religious subtext to his message that implies God, Angels, and the battle of Good vs. Evil are real and that we are approaching a chaotic time that marks the end of an age and beginning of a new one.