I think there is definitely a place for this kind of non-violent 'resistance'. It's an easy way to move public sentiment and bully fascists in a way that can't really be reframed by the media and such. No one is going to think people in these costumes are doing violence because it's absurd. Onlookers will start to understand that the idea of riots, gangs, etc is simply a lie.

That said, non-violence is not a long-term solution to fascism (obvious to most of us I imagine). The US people just aren't in a position to do much else. Any real resistance would be crushed at the moment because the numbers are simply too small.

Edit: should also note these people are still doing something good by wasting ICE resources just by being there. They can't be ignored by ICE or other cops, so they can even serve as a distraction for other activities and any time a cop is dealing with these goofy antics is time they aren't doing something much worse.