[Z]

I think it's just the fact that he's got half a dozen people in a house of what is now nine other people, not including himself, picking on him for being different. He's certainly not gone out of his way to provoke arguments with them, he just seems to irritate them and they all gang up on him. I probably wouldn't want to be friends with him in real life, I'd be more like Rodrigo is with him, not really a fan but being respectful about it.