Gun nuts are largely reactionary cowards. They see a group of well armed people with automatic weapons, armor, they assume they're cops or at the very least that they can't take them and will be killed so would never engage. There are occasionally exceptions that are nihilistic mass shooter types who would be willing to kill the feds but they usually tend to hunker down so unless they burst into the home fortress of one of those types it's not likely to happen.

Thing is ICE can't go into homes without warrants as I understand it. Which is why most of their stuff happens in driveways, at schools, outside in various places, workplace raids, etc. So their chances of running into and disturbing a burrowed in like a tick extremist with a siege mentality and heavy weapons and a willingness to use them to kill feds is very, very low compared to even normal cops responding to domestic violence calls. Sure over years of time they'll probably eventually try and traffic stop a Sov-Cit type who opens fire and kills one ICE agent but then gets themselves and their family in the car riddles with hundreds of semi-auto rounds in the response from their teammates.

Very few Americans ever dare to kill cops unless their backs are literally against a wall and they're convinced there is no way out. A normal reactionary gun nut would put their guns down because they are a citizen and respect ICE and expect that they'll be processed and released and thus have a way out. That is they expect that they'll be treated fairly.