Elf Sternberg

Perhaps, but there's probably a fair number of both semi-out and repressed gay men in the military, yet we don't see incidents like this with any regularity. I'd need more evidence before drawing that conclusion, like investigators unearthing a secret stash of gay porn/files or a history of visits to "anonymous" locations for gay sex, and we haven't heard of anything like that yet. You'd expect the preference to manifest itself in *some* form along the way, if it was strong enough to drive him to murder, even if it was just occasional "slips" or images hidden on his computer.

There's a lot of things that can drive one to violence and fanaticism, sexual repression/frustration could be one (as could things like drug abuse, mental illness, etc. etc.), but the most likely causes in this case seem elsewhere, given all that has come out about the particular brand of Islam he was following.