Who are "these people"? Who are "they"?
ICE isn't the be-all-end-all of the problem the US has with law enforcement, be it ICE agents or average street police. The US has, in my opinion, a problem with "us vs. them". From the small towns where the sheriff is hell bent on fighting crime to protect their township, all the way up to the president, it's "us vs. them".
Police vs. Criminals.
ICE vs. Illegal Immigrants.
Republicans vs. Democrats.
The President vs. Anyone Who Doesn't Bend The Knee.
I have some sympathy for US law enforcement agents, the actual officers that are on the streets, be they police or ICE or anything in between, because they're just doing a job that, thanks to media and a President that wants to use them like a hatchet against any group be doesn't like, face hostility every day. And this is where I think the US fails it's people and officers. Police are dispatched to a scene with the aim of controlling the situation through understanding it, de-escalating and enforcing any applicable laws, but these days the police work in the "ACAB" world, so expect to be faced with opposition at every step, likewise the citizens expect every law enforcement officer to be exactly like that corrupt officer they saw on the news or read about on Reddit. It's a situation that has been escalating and will only continue to escalate, quicker and quicker under a President that is so detached from reality that they believe everyone of tan skin with tattoos is a criminal.
ICE for their part have existed since 2003 and largely gone unnoticed until Trump weaponized them, again making them a hatchet to be used against groups of people he doesn't like and/or understand. ICE officers, like Police officers, work in a world where they perceive everyone as a threat, after all their current deployment is to detain violent criminals and gangsters that, according to Trump and co. should not be in the US. The officers themselves don't know if the person they've been sent to detain is actually an illegal immigrant with ties to a notorious gang, they only know that they've been sent to detain that person and that person may be a threat. It's another situation that can only escalate.
Us vs. Them.