I’ll second what the others have said: Stay away.
I don’t know that this guy is personally is dangerous as a lot of these guys talk tough from the safety of their proverbial armchairs, but he could sway others towards taking a more extreme stance. In any event, his attitude is negative and that’s NOT going to help you feel better or improve your outlook.
Complain to the school, or to whoever is in charge of the MSA, anonymously, if necessary. If you and your friends don’t have a place to meet aside form whatever the MSA provides, why not approach the imam and ask if he can provide you guys with space in the mosque or wherever (if that’s feasible, as I have no idea if that would be convenient for everyone).