A guy I met on a maymester is sort of scaring me. On the trip he was reserved and a little "off" he wouldn't say anything and then would make unconnected jokes about eugenics and Puting birth control in water. He had a nice friend who true to get him to losses up but he never really connected with anyone (this coming from me, a super asocial INTP). Now on Facebook he's reccently be posting repetitive rants about religious people and guns. Overpopulation and the general idiocy of the human race. It not just because I disagree a lot of his positions just don't make sense. I said something to him about it and he was very defensive and said they his options were all based on scientific observation and went on with it. It's seems really attention seeking but no one responds but this girl I think is his sister. He also goes on rants about how maybe girls would like him if he prayed to go and shoot of guns and joins the army. I'm not the biggest military fan but it's such a flat stereotype from and educated person.
Today's posts are about how apparently other students have claimed he is unprofessional but he thinks they are unprofessional for ignoring him in the hall and upstaging him in projects. With the implication that they'll screen shot his post and use it against him. It just seems like he's a little disturbed, angry. and not quite all together. He'll make like ten posts in a row about the same stuff.
What can I do?