How in the world did we win WW2 without openly gay soldiers?
It's a miracle.
I refuse to accept the view that mankind is so tragically bound to the starless midnight of racism and war that the bright daybreak of peace and brotherhood can never become a reality. - MLK
Second, it is not that allowing gays to serve openly will somehow make us able to win every war or even a much better fighting force. It is the fact that allowing gays to serve openly will actually be standing by the US ideals of freedom and democracy for all (not just heterosexuals) and it will actually show that the military really is fighting intolerance within its ranks.
"A woman is like a teabag, you never know how strong she is until she gets in hot water." - Eleanor Roosevelt
Keep your religion out of other people's marriages.