There are (small) advantages. The "Proud Boys" (did they really not consider how easily that might be subverted?) have made an identifiable 'brand'. Muddying or inducing them to abandon that brand may, theoretically, dampen their message.
Yep, even just temporarily disrupting their title, perhaps forcing them to pick something else, is a good thing.
Of course, if there's one thing I know about tight-knit "brotherhoods" it's that they're full of homoeroticism and some of them are going to take that close masculine bonding to the next level. For instance, the Nazi SS had quite a lot of homosexual activity which, for all the Nazi leadership's ferocious rhetoric of annihilating homosexuality, was broadly tolerated. It's not just the male bonding, if you're part of a movement that lionises male attributes and thus in full or part also maligns and belittles women, you're almost asking men to think that a partner worth their affections will also be male.
Eh, to a degree I guess, but my experience, living in the south, surrounded by homophombic bigots, is that no amount of lionizing male physique is going to make them want to suck the cock. A large number of them though, are pathologically afraid of being associated with it at all. I mean they violently recoil at the mention of it. I know, because I actually used to test a lot of them at my old job. I would ask them casually if they were a homosapian, and you could see their brain just shut down as soon as I uttered "homo", and they would flinch away from me and look around in panic, to see if anyone overheard me asking them. "Hell no!! get away from me!" or some variant would be the common response. Not ONCE, did any of them actually realize I simply asked if they were a human. The truth is, a large number of the people that rally to causes like this, are fucking idiots, that react in a reflexive manner, instead of actually engaging their brain. Plenty of them are smart yes, but many of them, are just flocking to a comfortable banner, that shares their views about all the Not-Thems in the world, and that get equally aroused at the thought of firearms.
So no, I don't think any significant number of them, are suddenly going to be like 'hmm, you know what, theses gays have got the right idea, I think i'll start taking it up the butt because my Proud Brothers are just that ideal of a specimen of white male, that my own sexual preference has been supplanted."
The closeted members of their group might feel excited a bit, but the majority of them, will only have a negative/indifferent reaction to something like this.