They'd run away from any confrontation they think they might lose, federal agents or otherwise. They want to feel powerful and terrorize the already compliant, get the dopamine hit without having to actually fight.

This psychological problem occurs in cops too, notably in britain where they arrest people for tweeting and ignore murder, because murderers fight back. But you see it in america too where if two parties have a conflict and one runs away, they'll just arrest the guy who's still there because it's easier. Happened with the antifa vs proud boys fight.