Given that ICE "agents" have been hiding in unmarked vehicles and covering their faces as they go around kidnapping people, I fully support folks using great force to stop them. Not that I'm recommending or suggesting it, but the reaction makes sense. Self-defense.
The goons should be scared. Also, this is a job that *no one* has to do, so any fear on their behalf will not suffice as justification for how poorly they treat people. They have zero right to kidnap or take away due process.