As much as I'd be interested in seeing it happen, the feds aren't that dumb with all the false flags under their belts. The optics of "killing law enforcement who are doing the job the feds should be doing" looks bad if the feds want to act like the good guys. Even supposedly anti-cop cities are complaining about the illegals (unless they get enough of a kickback).

I know the feds really, really don't care about optics, but they know they won't win a fight against the populace without enough foreigners and illegals acting as a distraction.