That's exactly my understanding this kid's motivation. Something about unhappiness with DADT, and maybe an addtional angle that there was some kind of spat with his "boyfriend".
Based on emotion, not science the American Psychiatric Association decided in 1973 that homosexuality was no longer a mental illness.
DADT recognizes that it is. These two are in conflict and must be resolved.
I say, let’s look at the science. It’s worth revisiting:
http://www.thisamericanlife.org/sites/all/play_music/play_full.php?play=204