I think we need some people who know more than me about this stuff to give us a HOW. Would it be better to start shoving? Screaming? Would locking arms and chanting “where is the warrant” work? I ask because I would mostly likely freeze in this scenario, but training would help.
You have said what I wanted to say, fight or flight and I tend to fly.
People have to lock the building down if they get in. Ideally ICE must be prevented from entering public buildings in the first place. Their authority is completely bogus. If state police are providing support they are crossing several lines, including aiding and abetting a convicted felon.