Who's "they"? And provide me with a source on this one.
Why? I'd rather see the army run as well as it can be. If the commanders see a legitimate problem with gay people being in the military, I don't want to have a less effective fighting force for the sake of being nice. Soldiers sacrifice constitutional rights when they enlist, anyway.
Yes they do sacrifice rights, A LOT OF THEM. But where the hell do you get that gay people would make the army less efficient? A man got kicked out who was one of the few arabic translators they had for being gay. Did he ever fling himself onto the other men in his unit? No. He did his job the way he was supposed to and better than most, but because of his sexuality he was kicked out. That is stupid. That is not efficiency. You cannot tell me that if someone does a job better than someone else, but the army doesn't like them because they're gay, that better person should be kicked out.