He's mad at what Emu said specifically. But Lance raged on here about Yamato's gender before and it caused a lot of drama and Redon has raged about it before. Even Piratefolk is a huge mess atm for the same reasons. And also the One Piece main sub before and probably again right now too.
Fucking Oda wont stop dividing and trolling the fandom. He gets off on making people fight with each other. Playing both sides like
@Mr. Reloaded