It seems the majority believes that Luffy has somehow lost his mind and has been taken over by his Zoan form. I dont think that is the case yet because Gaban said it is the decisive moment not that it has already completely happened. But more importantly if Luffy had lost full control then he would be rampaging everywhere but instead he went to the West Village and specifically took out Zaza instead of hurting everyone. To only take out Zaza and save the children while not harming anyone else seems that Luffy has some sort of control over the directions.