[dang]

As the commenters have pointed out, you're creating lots of negative reactions by asking your question in this way. I'd add that you don't need the word 'autistic' here at all - your question would be clearer without it. Also, your text implies ("most likely") that you don't actually know if he's autistic, or why that would be relevant. You'd be better off sticking to what you do know—i.e. reporting your own experience and direct observations. Then you'll be able to give people more information.

Actually, your title would be better off without "thinks they're better than everyone", too, since (unless you have a mind reader) that's not a direct observation either. If you describe your situation more factually and neutrally, you might get a better response from the community. Just a thought.