Maybe Henrich was just a screwed up mental case who couldn't get laid and ended up rooming with a muslim.
The constant cultural difference of his muslim roomate's friends hanging around combinded with his sorry social life caused him to kill himself in spectacular fashion?
It's not like it was a dorm, where if you don't pick a roommate, they may assign you one. This was an apartment, albeit one owned by the university. In those you pick your roommate.