Out of his jurisdiction at 0130, in uniform, for the express purpose of doing a personal errand while in uniform -- you can't find anything wrong with anything there?
So it was a personal relationship, not the use of his uniform.
We don't know that. He may be protecting the janitor, but we don't know anything about whether Mott knew Cliche or not.
As for opinions on reacting to a political agenda, that is an opinion, not illegal.
Mott's actions -- political or not -- could have been undertaken without the use of a uniform. Political opinions and Mott's reaction thereto, does not justify what he did.