Why is the Military Allowed to Be Anti-Gay?

It looks like the 'Don't Ask, Don't Tell" policy for military service may be repealed soon. On Thursday, congress voted for an amendment that would end the DADT policy. DADT does not allow homosexuals to openly serve in the military. I know there are many Americans who are anti-gay or homophobic, so obviously it would not be expected to hear much outrage from a large percentage of Americans, and actually you would expect support of DADT. But wouldn't you expect the government to to recognize blatant discriminatory actions, especially given our past?

Although, it can be said that the government is just being representative of the people, because it seems that democrats are against DADT, and the republicans are for it. Most of the opposition to gays serving in the military, obviously comes from conservatives, but it really comes from a place of homophobia and a non-understanding of homosexuality. It is anyone's right to feel that homosexuality is immoral, and the US is largely Christian, so it's understandable that many people would feel that way since this concept is taught in churches. But the Christian laws do not govern this country, or at least they should not, because what is considered immoral by Christianity is not considered immoral by everyone. Immorality should be judged by whether an action intentionally hurts someone, and being gay obviously does not fall in this category. But that is really besides the point, because how being gay affects whether these people can serve in the military is what should be examined.

How does being gay affects anyone's ability to strategize, fire a weapon, or show compassion for others? It doesn't, and I think the military realizes this, because otherwise they would be actively conducting investigations to determine whether people enlisted in the military are gay. But they do not, so why even have the law at all? I guess congress has realized this, but the policy still has to go through more barriers before being repealed. According to Reuters.com, "...repeal also would require certification from Obama, Defense Secretary Robert Gates and the chairman of the Joint Chiefs of Staff, Admiral Mike Mullen, that the new law would not have a negative impact on readiness, unit cohesion, recruitment and troop retention." Any one of these things could allow the discrimination to continue, which is absurb, since none of these factors would allow for discrimination in any other work environment. Knowing that, it should hopefully be an easy repeal. If people want to fight and defend their country, they should be allowed to without worrying about discrimination.