Is this Aspergers or mental illnesses?

I have a friend who is disabled. He told me he had Aspergers and that his IQ is 75. That checks out since he can’t read any book that isn’t a children’s book. However, I’ve been friends with him for 9 years and he has displayed many signs of things that seem to be indicative of mental illnesses. For example; he believes that because certain authority figures have told him not to bother people that they are horrible people and will never let their own kids make decisions when they are adults. He told me he is ethical because he eats vegetarian and asks strangers about their undergarments. He says that he is a pleasant person to be around after telling people to shut the **** up and has said that people can only get food from him after he has thrown up. He also believes his 8th grade teacher is going to come to his house and take away his books. Yes, this could be autism speaking but it also seems to be schizophrenia since his view of reality is incredibly warped. He has also expressed violent desires on people who didn’t answer his  questions. He also thinks it’s okay to direct farts at people on the subway because he claims they smell good. He has also sent me text messages that are clearly him trying to annoy me as I have called him out on it several times. Is this just autism or does he have psychosis, schizophrenia, anti-social personality disorder etc?