Mistwell
Crusty Old Meatwad
It sounds like to me that the answer to your question is "because he is influential in TTRPGS and this is a place where we can discuss those types of people, regardless of other's personal feelings about him".
You skipped "I am asking why, if the theme of this thread is, "what's appropriate behavior" people are promoting someone known for bad behavior"
I mean, are you seriously saying I shouldn't question "guy known for inappropriate behavior" when he calls for a change due to what he perceives to be inappropriate behavior?
RPGPundit is "influential" but would you be objecting to someone raising this same topic about what he views as inappropriate behavior? This sure seems to come down to "But I like him so it's OK."