So basically, he believes the Star Wars franchise was destroyed by toxicity and reactionaries(right wingers according to him), and was afraid the same would happen to One Piece? Because of this fear, he tried to forcibly get rid of any form of right wing in his eyes, and earlier he insinuated only leftists are OP fans.
With this, the perma ban is definitely best for the mental health. Star Wars isn't One Piece, and this is a random forum in the corner of the internet instead of something like Reddit, Twitter etc.. He'd be wasting his time and neglecting himself pretty much forever so again, all for the best.