The home country of many (if not most) of their victims is the USA.
Sure, ICE are inhumane nazi monsters, but extraditing them to that god forsaken shithole would evidently count as cruel and unusual, even for the likes of them.
Not only that, but “justice” there is a tragic parody of itself; they’d inevitably end up back on the streets.
Don’t overcomplicate it. Just put them down like the rabid pigs they are, and then go for the even more monstrous bastards that sicced them on the streets.
It already exists, it’s called OpenBSD.