> If he disagrees with you he's not afraid to tell you you're an idiot Honestly, I think this is the other way around. People get defensive and call him names

> If he disagrees with you he's not afraid to tell you you're an idiot Honestly, I think this is the other way around. People get defensive and call him names when he is pointing clear mistakes / bad practices. Of course you get frustrated when someone calls you names and it's natural to pay them back in their own coin.