I think it would have been enough to remove the moderator from their "position." Like when they removed one inadequate person from the coordinators, the one who liked to write in blue and would remove the blue color from users' messages.
As far as I remember, he left on his own, and I think it was a mistake. Of course, he started deleting and editing posts inappropriately at that time, without understanding the essence of the matter, but they could have just explained it to him instead of immediately removing him. And the situation at that time was not very good; I think one beautiful girl was accused of cheating, and many people were writing both against her and in her support.