There have been gays serving in the military since militaries have existed. They have served with honor and distinction beside their straight counterparts. The service people I have spoken with and those I have heard speak or read about, all have said they know who is gay and who is not and it does not make any difference. So long as the service person (gay, straight, male or female, white black or any other minority) can do their job they do not care.
The sad part is the ignorant slobs like the one above have no idea that that same ignorance being used against gays in the military was also used to prevent women and minorities from serving. Yet here were are with women and minorities serving in the military and our military is still able to place 79 soldiers into hostile territory, accomplish their mission and bring them all back home.
Ignorance will always be a part of society. Fortunately as those generations die off, the ignorance becomes more and more rare. The younger generations do not seem to be as biased and ignorant as those who came before. The Hackmans of the world are dying off (thankfully) and the world is spinning on it's axis just fine.