Well, let's just say that homosexuality is an abomination.
The authority for this is God as per the Bible.
No society has ever prospered for long that openly condoned homosexuality, and I doubt any military will "prosper" that openly does either.
Some things are just wrong. Those who have an urge to do wrong things shouldn't.
I am not for openly persecuting gays just like I am not for openly persecuting anybody who does wrong things (unless their wrongs infringe on another's rights). In other words, I am a libertarian. If somebody wants to shoot heroin or whatever else, I say leave them alone as long as they hurt only themselves.
Of course, they should be told that shooting heroin is a really bad idea, but if they persist they should be left alone.
The homosexual lifestyle is self destructive much like heroin even putting aside morality. Homosexuals get certain diseases in far greater numbers. They tend to die younger due to diseases and probably a variety of other factors also.
Corrupting the military with immorality is just a bad idea. A military needs all the blessings it can get. A truly effective military is much more than a collection of individuals each with various abilities and training. It is a team. This much like a football team. It doesn't need to be poisoned by immorality. Real practical problems exist as others discuss.
The practical problems I think are very real. I know women are the victims of sexual harassment. But, I actually was victimized last year and the consequences continue to this day. There was the woman who I found repulsive who made her interest in me way too obvious. When I refused to fulfill her fantasy, she retaliated against me.
You are going to have that kind of thing going on with gays in the military. It is just going to happen. Same for women.
I see a compromise. Much of the military is not really that "military." They live and act much like civilians.
I would make a distinction. Women and gays can serve in the "civilian" part of the military but not in the hardcore military -- actual combat units that live and fight together whether on land, sea, or even in the air. Women I think are not the best "fighters" anyway. Sorry. But its true. Some gay men I have no doubt are great fighters but .... as discussed above.
As for Israel, they certainly have some really great historical victories. They certainly did some real ass kicking for example in the 7 day war. What? That was in the 1960s, right? I am not sure they have done that much real ass kicking recently since they have liberalized their military with women and gays. I don't think you can really count the prowess of their air force because it is based largely on U.S. equipment and training and at least recently their air force hasn't had much real opposition.
One more thought. Our society is largely feminized. There is really no place where men are allowed to be masculine. A young man who wants to prove that he is a man can go to the military. This is a right of passage -- marine boot camp, Navy seal training, Ranger training, etc. A young man can "prove" that he is a man.
The same is true for actual combat. A young man who fights for his country indisputably has proven his "manhood."
This is a large part of why men join the military, I think.
Yes, women are in the military now, but women don't do the real man stuff generally and don't threaten the real man thing as much.
If a young man joining the military runs the risk of being viewed as a potential "fag" they are going to stop joining.
If the military every has enough "fags" that it is viewed as a homosexual institution straight men will stop joining. Guaranteed.
I doubt we have enough "fags" to win wars. This is just a very bad idea IMOH.
I basically support don't ask don't tell. As long as the service member keeps it private, I say fine.
But, once he comes out of the closet in the military, I say bad idea. Really bad idea.