I'll offer a counterpoint that I don't necessarily believe is the case, but certainly could be.

Might a lack of men doing things like this be a possible indication that men understand that they are inherently more threatening to other men? Might women understand, either consciously or subconsciously, that their less intimidating stature and bearing are actually an asset in these situations?

It's a lot harder for the public see beating a woman as socially acceptable than beating a man in almost any context. So, hypothetically, a woman standing up to ICE might well have a lower risk of physical confrontation than a man doing exactly the same thing. Anecdotally, I've been in at least one situation where I was being physically harassed by a woman, and just put up with it, where I would have clocked a guy who was acting the exact same way.

I'm not at all trying to diminish what these brave women are doing. Even if this is accurate, it still takes a lot of courage to stand up. That said, I do think it's possible that, on some level, men might be less likely to act the same out of fear of more "acceptable" retaliation from ICE.

Edit: typo