how? as far as I know he actually hasn't posted anything that's bannable like hate speech, racism, and bigotry targeting real-life groups (see here-
https://project1999.com/forums/showthread.php?t=426330 ) if he has, please report it and it would be a well-deserved ban.
did he condemn a specific terror act? no, but that's not bannable. nobody is forced to post anything against their will or make any sort of claim.
it was certainly a successful troll too. look at the body count of banned posters.
people posting literal unhinged racist shit get banned and deserve it. please try a bit of introspection.