Their objective is two-fold. They want to mainstream homosexuality, and they want to destroy the military.
Remember, they don’t respect the military, they don’t like the military, and they view it as a waste of valuable resources that could otherwise be spent on social programs like Turkey Basters for Lesbians, ACORN, the NEA and other similarly useless or partisan government programs.
It is the same reason they constantly agitate for the draft, while at the same time, accusing Republicans of secretly plotting to bring it back.