Comment by metalcrow
In theory, they are within their rights to retaliate. If an unknown person tried to kidnap you and doesn't present any form of ID, you have a very very strong case of self defense and genuine threat, and that would likely (IANAL) hold up in court if you ended up shooting them. It ended up holding up for Randy Weaver! You would want to surrender immediately upon being shown some ID, of course, but you could get away with it.
As for why law enforcement isn't taking sides, it's because doing so would basically be the start of a state succession attempt, and would bring federal agents in to take over the state. Some states have claimed they are willing to do that in certain situations (Alaska has said in the past it will use state troopers against government if they try to enact certain gun control laws), but no one is willing to go there yet. The best they can do now is categorically refuse to assist the feds.
But how do they know those are federal agents?
I mean, if masked, unidentified people are kidnapping other people, what prevents _other_ masked, unidentified people to attack the kidnappers?
Where this goes, as I understand it from my European heritage, is that you are _already_ in a situation where there's a strong incentive for an active resistance force to appear.
ICE is clearly working as both an oppressive force, and as an incitement to violence. There have been precedents in history. It never ended well for _them_.