I haven't taken any position, I'm only pointing out the parallels of the argument you're making to mistakes us humans have made in the past, that we don't want to make again.
But if you want me to make an assertion, I'll go with:
We're all on this blue marble together; Us vs Them is a negative sum game we don't want to play. ICE has earned the reputation they have, and until they do something that changes them from "dog murderers" and "targeting the wrong people", we shouldn't afford them any sympathy or excuses. ICE the organization might not directly be able to alter the laws they're given, but they can directly influence them, and change the way we talk about it. Individual ICE agents, likewise also can't change the laws they enforce, but they can change how they enforce them. They can spend more time doing what's right, instead of doing what's easy. They can take things a bit slower instead of murdering important family members, or making children afraid of what's going to happen to them.
Yes you were, you were also implicitly defending ICE. "It's not their fault." Perhaps, but they're contributing more towards making things worse, than making things better. So, technically correct or not, they deserve blame more than they do any kind of defense.
