Since you're only getting blowback, I think taking tough action on immigration was a long time coming. I don't agree with the violent tactics, but exactly those people who couldn't settle on some sensible solution are the ones that fostered the current situation where the (anti-)immigration pendulum swings back hard.
That's where I'm stuck on this. When you have certain cities (or even entire states) saying "we will resist _any_ deportation effort", what choice does a deportation officer have than what they're doing right now?