Yeah, he's so ridiculously hostile that you wouldn't expect it in real life. One of my other groups mates has literally told him he's the angriest, most disagreeable person she's ever known, and he's the one holding up progress, and his response?

"No I'm not." And then proceeds to argue about why he's not disagreeable and hostile.

Just wanna fucking bang my head against a wall sometimes. He's so disrespectful to other people, when he whines so hard to get respect himself. He's cut me off so many times in the middle of sentences, while yelling at me and others when they do it to him.