I don't think they were discharged for being gay.
I'd bet they were discharged for talking about it.
I wonder too how many were discharged because they wanted to be? After all, if one doesn’t like military life, all one has to do is say “I’m gay” and you’ll be sent out. It also sounds like there’s an extraordinary number of gays/lesbians in the military versus their % in the population. 13,500 discharged in 10 years?!