Not sure on the opp or not since some pretty famous Marxists the last century made similar errors before some of the big wars and had a century less of noise/propaganda to filter through. We do need an international anti-war movement, but it should be grassroots and notso funded by billionaires. The sentiment is 100pct there, lots of sympathy from bars to workplaces in even in the Imperial core, moreso in the periphery, real question is to make use of it, not overcomplicate things, but that's more for influencers, orgs etc who can project and get out there to come up with everything, not me.
I'd agree with you because RAWM is also funded by various big bourgeois factions (Peter Thiel comes to mind), just a bit more cloaked in anti-imperialism, imperialist anti-imperialism if you will, made to perfectly consolidate some power from the most reactionary parts of the petite bourgeois/bourgeois using some culture war stuff and what's left of the mostly gone anti-nuke movement as a lure to confuse. Its a simple playing every side that can be found, though not so simple, though by airing their complaints this time the bourgeois again push themselves deeper into fascism.
On diamat he must have done the standard western 3 stager that falls short of true analysis which goes through the 'dark night of the absolute', which I think was left off here if I were to wager, which is why on the surface it'd seem like its a critical support ala your usual anti-imperialist but imperfect theocracy or what not, but you look into it more, think of who in the imperial core benefits if this ran to its conclusion, if they'd truly be what they said, who is running this, how bourgeois movements tend to push the opposite of what they desire; Ex fighting for their illusory ill-defined freedom leads to the tightening grip of markets and development of fascism. RAWM is no threat to the core's machinations for big war beyond our nightmares, and is a good trojan horse should they need to gain control of the movement for any purpose, ironically even pro-war.
Agencies and some academic-business thinktank circles (lots of overlap between the two) do a lot of thinking 'games' like this to generate a ton of ideas or find hidden connections without diamat or spending a whole lot of time studying by trying to use 'creativity' pretty much alone as a crutch.