First, it says he was on the fed radar since high school, which is the same thing that is true of all fed assets pretty much. Enough that it's the playbook by the fed. But that's not evidence enough on it's own. Here's the actual evidence
According to Thomas Rousseau
"Rousseau believes that Donald Trump is a white supremacist in line with the values of Patriot Front however he only "indirectly supports" people like Rousseau.[4]"
and also
Rousseau claims that "[White people are] being relentlessly erased on all sides, by the Jew, by non-whites who hate us"
Every dissident right person I have ever encountered hates Donald Trump and considers him a "traitor to white people and he's Jew owned". Interesting that Rousseau seems to be the only dissident right person who aligns with the media narrative of Trump being a white supremacist.
Who benefits from this statement for his organization? It doesn't help Patriot Front recruit mainstream conservatives (who love Trump but reject white nationalism). It doesn't help them with the dissident right (who think Trump is a Jew owned puppet).
The only entity that benefits from this statement is the establishment media and federal agencies. Rousseau's statement provides the exact, explicit link that the media needs to validate their narrative. It allows them to print headlines saying, "White supremacist leader confirms alignment with Trump."
I actually believe Rousseau is a fed asset because it's rare for these men not to be. It's incredibly simple for the jews to intimidate and eliminate anyone who is a problem for them. They brought down Elon Musk and Kanye West, both in less than a month of trying. Rousseau only exists because the jews let him. Either because he's deemed completely unthreatening or he's their asset. It could very well be the former but I would suspect the latter and all people should suspect the latter.
However, your analysis and rationale for why he's a fed seems wrong to me. Rousseau was a prominent Trump supporter in 2016 which aligns with a lot of "dissident right" people's opinion. Rousseau's more recent view of Trump shifted from his 2016 views of trump to be far more neutral and diplomatic. His exact view is that Trump's Nationalist policies align with White people's interests, which is true, so he supports Trump given this, which is a very diplomatic way of supporting Trump but also being able to not support Trump in given contexts. This aligns with many dissident right people's views. I think every dissident right hates Trump for being a jewish dicksucker but also, he's better than Harris and some of his nationalist takes are good for White people despite the jewish dicksucking. Also, this is just my opinion but Trump going all-in with Netanyahu in Iran but losing and potentially rebuilding Iran might actually in the long-run lead to WWIII where Israel is potentially destroyed and we may look back on Trump's jewish dicksucking as being a good thing. That's a bit of an optimistic hope but I can see that potential future now and it wasn't there before.