The point here is that the people currently in charge hold 100% of the power, and they're misusing it. You don't have any power, nor do I, nor do the poor American citizens who may or may not be executed.
They, the people in power, do not require your good will or help. They're already maxed out. They are already 100% legitimate and in control. While it might be nuanced to argue ICE as an institution is one which should exist, it's also just doing more harm.
For someone that complains a lot about people lacking 'nuance', your post history is guilty of the exact same crime you complain about. So it's doubly clear that you're not actually arguing with good intention.
Then stop hiding behind "nuance" and be more explicit about how you support what's going on. Everyone who disagrees with the ongoing blatant fascist police state activity do not lack nuance, they lack your ability to suppress empathy.