The Antisocial Socialist

 Just spitballing here because I'm only on my second mug of coffee for the morning, but how about raising the social cost of being an ICE agent. Sure, you won't go to jail, you won't be charged with human rights violations, nothing the UN is able to do is going to stick to the US, BUT the concerted efforts of a group of organized citizens can make someone's life unliveable. I'm talking about doxxing, public shaming en masse, finding out where they live. Going door-to-door to their neighbours with flyers, well sourced and with photos, explaining that the person who lives in the house down the street participates in an organized gang that kidnaps, murders, and sexually assaults children, separates them from their families, and incarcerates them. Find their social media accounts and mob them. Inflict, on a community level, the sense of shame that they do not apparently possess.

Fascism is allowed to take root when the social cost to being a fascist is low, and large groups of people are dehumanized. Fascists don't necessarily change their belief system when you make it embarrassing to be a fascist, but they are less able to organize, let alone get paid by the State for jackbooted thuggery.