What I want to see is people telling these ICE agents the truth.
Point out Trump's failing health, and that he might not even live long enough to finish his term. Show them that he has attacked anybody who could be his successor so the MAGA movement will collapse as soon as he's gone.
Let them know that they will be prosecuted like the guards for Hitler's concentration camps. Just following orders won't be any excuse. Even if they manage to avoid prison time, the fact they worked for ICE means that when Trump's out of office, nobody will ever hire them again. It doesn't matter if they were just doing it to feed their families, being a former ICE member will be seen like being a former member of the Gestapo, a mark of shame for their families for decades to come.
Tell them that hiding their faces isn't enough. Ask them if they fully trust every other ICE agent, or if ICE might have been infiltrated by protesters. Point out that their fellow agents have already screwed up and left behind lists of ICE agents when they've had to leave a place in a hurry. Tell them that with modern cameras it's just a matter of time before an unusual mole or the edges of a tattoo are enough to identify them.
Then tell them that there's only one way to salvage their reputations and their future career prospects, and that's to become whistle blowers.