Well, yes, but this is a necessity.
You can't (yet) run such a system otherwise, it would take way too much funding & time/indoctrination to get unwilling-ish people to do this shit.
Currently ICE HR uses the base mass unemphatic culture with strong branding (+propaganda) & sense of belonging. Which are cheap to exploit/already there.
But even the most sadistic such agents have a limit, more of a hardwired shellshock type of thing that builds up (the more extreme example is how Nazis just had to stop mass executing villages bcs even soldiers that really wanted to do it had like a gore limit that built up to the point of them being unable to physically work).
With ICE agents not seeing the full horror first hand (and just willing to not imagine the consequences) this limit is far off I imagine, unfortunately.
I'm not advocating violence, this is just as a system explanation/mechanic, but ICE agents morale (and thus the effort) is def very vulnerable to any violence at this point. That is the reason why they are getting only the tamest job assignments (=human targets), suspiciously so. It's not like it wouldn't help the propaganda machine if they busted violent gangs (they have all the equipment & overwhelming numbers, just not the people capable of not falling apart with such actions).