I'm sure back in the '50s there were plenty of white soldiers that were just as uneasy when blacks were integrated too. Were there growing pains? Yes, but by and large the military made it work. Adapability is one of the military's great strengths.
I put my penis in a woman at night, some guys put their penis in men at night. No matter what your preferences are, someone is getting &ucked. Not sure why it matters what sex that person is.
The expression "what another man eats doesn't make me ish" applies here. Nobody is affected by this, well the media and the people that have to do the paper work to overturn this....but that's it.
Did the military make is acceptable to have straight sex in more than just missionary position. That is a more logical "rule" to abolish, because in the past it has been frowned upon to do doggy and stuff. Not sure why though.