Statements by military leaders that there would be no problems with allowing openly homosexual men to serve in combat zones would be more convincing if the military wasn't having a problem with its male personnel sexually assaulting its female personnel.
Female veterans on a recent PBS documentary said that women were afraid to go anywhere on their bases alone in Afghanistan and Iraq because of concerns about being sexually assaulted.
The main problem with allowing openly homosexual men to serve in combat zones won't be them attacking others, but others killing them because of concerns about being attacked. Some homosexuals claim that they look at other men the way men look at women. Many could interpret this claim as indicating homosexuals might attack other men the way some men attack women. .
A woman who is concerned about a sexual assault will take defensive measures such as finding someone to accompany her when she goes some place. Men are sexual predators and when predators are concerned about being attacked they may respond with a preemptive attack, particularly when they are in a combat zone where they have to be prepared to kill or be killed.
In Vietnam, the term "fragging" was coined to refer to one American killing another particularly by using a grenade. Sometimes the target was an officer who was considered overly aggressive in combat and thus a "threat" to the life of whoever decided to attack him.
I recall reading one news article about an enlisted man in a rear area who killed his first sergeant who he claimed was putting too much pressure on him.
In Vietnam I knew some infantrymen who smoked marijuana in the rear area who said they would kill someone for smoking it in the field. There was a case just before I left Vietnam of a man who was accused of killing other members of his unit for using drugs in the field.
Rape is often associated with warfare. Soldiers released from the moral controls that discourage killing may also lose the controls that discourage sexual assault.
There is the possibility that homosexuals in a combat situation might attempt rape. A more likely situation would be a false perception that a homosexual might attack. Such a perception could lead to action against the homosexual who seemed to pose a threat.
Women know that some men sometimes misinterpret an act of friendship as an indication of sexual interest. An act of friendship by a known homosexual could also be misinterpreted, with potentially fatal consequences.
Incidentally, Federal Judge Virginia A. Phillips violated the Constitution when she ruled against the "don't ask, don't tell" policy. The Constitution explicity assigns the powers to raise, regulate and direct the military to the legislative and executive branches. Congress and the President are free to exclude anyone from the military based on physical traits, personal characteristics or for engaging in behaviors that the Congress or President believe might interfere with military operations. The President even has the authority to deny freedom of expression to those who wish to serve in the military as President Barack Obama did when he fired Gen. Stanley McChrystal for making negative comments about Obama. The courts can only intervene if punishment for military infractions involves something like imprisonment or death.