Your post here ignores the fact that in 1948, President Truman ordered the military to desegregate. I believe that was almost 20 years BEFORE the Civil Rights Acts in America at large.
DADT has been a disaster. Observe the NCIS report from Okinawa from a few years ago where the IG found Marine commanders had routinely been violating the law. How about the recent tragedy of Matt Rocha, who was forced out because of his rape in Bahrain?
"When we go into battle, I will be the first to set foot on the field, and I will be the last to step off, and I will leave no one behind. Dead, or alive, we will all come home together." LTG Hal Moore, Jr., USA (Ret.)