Comment by RHSeeger
It seems like it would be possible for state and local forces (police) to arrest and imprison ICE agents that are acting illegally. Specifically, arrest them for kidnapping when the nab people off the streets. Sure, they'll get out because they can lie and pretend they have cause; but they could be locked up for a while at least. And do it enough, and maybe they'll start thinking twice before acting stupid.
I have bad news about the police. They are exactly the same as ICE. If they fight it would be more like gang warfare over turf and money, since that is all they really are.