I’ve seen people like this many, many times. I understand your dilemma – they offer a lot to the community.
I think you need to weigh up the value he offers vs the damage he is doing to the reputation of your community.
You say that he is already affecting that reputation, so I think you need to mitigate that damage.
[quote=“AlexAB, post:4, topic:28313”]
It’s most liberating.
[/quote] and
imply that he is not going to change. He’s on a crusade. Warning him is unlikely to have any affect.
If it were my community, I’d talk to him (which you have) and if he continues, I’d ban him.
No one person is worth damaging everything for.