So here's the thing; they can go after a few people. Marginalized largely disconnected from close social ties, doing relatively marginalized fungible labor. They're literally picking on the most marginal people, who nobody will stand up for.
And its bad
And people are still getting upset. Not as upset as rhey should. The kin of ice agents should be getting butchered on live streams and their screams remixed into dance music, but upset. They're not recruiting anywhere near what they want. Not for ice, not for the FBI, not for the military.
The deeper they reach into society; the more things they're gonna break. The more people are going to oppose them the most loudly.
They do have a lot of power to destroy. They could wipe a city off the map, they could do that easily. And even they're not fucking retarded enough to believe they would survive that, that it wouldn't just be the absolute end of the systems of 'authority' and 'legitimacy' they rely on to make 80% of the military and maybe 5% of the cops do their dirty work.