The most recent thing I saw on hexbear about "red-brown alliances" was when there was a bunch of astroturfing for the fascist led rage against the war machine rally going around the internet. They aren't the kind to call MLs redfash.
The most I can get from OP's hysterical screed is that they made a post about the banner in pic related complaining about it on hexbear, got banned for being an insufferable prick, and made a post here to seeth about it. They're also flipping shit at lemmygrad admins for reasons unclear.
Edit: Found the post. Called it, @ICBM@lemmygrad.ml is a fucking dipshit who doesn't know what words mean. Get a load of this:
Hmm, could the website that regularly defends the USSR be addressing actual fascists? No, they must be using a dogwhistle to call the USSR fascist.
What a headass.
Not one person in that thread said you had good points..