OK SOMETHING IS WRONG WITH MY BROTHER IN LAW!?

My Brother in law is resentful of being mexican american he think everyone thinks like him for instance even if he is mexican american he dislikes it and said that everyone in mexico and he meant the whole republic of mexico is below ''HIM''for being american citizen ironically he married my sister me and her are both from mexico he says that all mexican americans would rather say shoot themselves before going to mexico i know it isn't the best country at all but it's my homeland and if i came here it was because i wanted to try college here and is great but this is obssesd for he says everyone thinks like him and that if you are not american then your nothing seriosly that makes feel bad HE WANT TO GET IN OUR HEADS THAT IT HAS TO BE THAT WAY LIKE IF IM GOING TO LET HIM GET TO ME.