I don’t know if you watched those videos but even if he did commit a crime the marshals are way way over the line when they arrest him.

That's par for the course in America

Law enforcement is the US is trained to use (often rapidly) increasing force to compel compliance. They are trained that this is the only way to keep themselves and partners safe.

Proportionality is law on the book. Throw enough LEO who violate this into prison, the problem solves itself over night.

Any concept of proportion has in it a constant. Here the constant does not favor the public.

I'd use "lobbied", "sponsored" or "encouraged" instead of "trained"

Look up "killology" for more on this.