They're just thugs who gang up on people and use the violence they themselves are committing as proof of "resisting arrest" to justify escalating violence. There are now numerous videos of them using excessive force, like spraying a from inches away while while am agent has them pinned down, hands behind back. Or a subdued person in cuffs getting a knee to the back of their neck.
https://www.startribune.com/border-patrol-greg-bovino-smoke-... ("A federal agent sprays a man being pinned to the ground by other agents following the detention of at least two teenagers in south Minneapolis on Jan. 21. (Richard Tsong-Taatarii/The Minnesota Star Tribune)")
In revolutionary France.
[1] https://www.reddit.com/r/Minneapolis/comments/1q9p1dp/man_kn...