I have a girlfriend who is trans and is currently in Wisconsin visiting her son. On her wall, she posted a photo of her, her ex and her son. I should not that in Wisconsin, especially around the kid, she has to present in "guy mode" because her ex is schitzophrenic, and has full parental rights to the child, while the girlfriend has none. When a photo was posted on her wall, a gay friend of mine who's a hardcore Kinsey 6 and all that made the comment "are they not letting you be around your son in drag? is his mommy jealous of him having a photo with his other 'mommy'?" Needless to say, this made her extremely furious. I get it in the neck when I bluntly said that she blocked him because you basically called her "Nothing more than a guy in drag".
After that, I wake up to 6 messages of him saying that my girlfriend isn't a girl and that she's a guy who suffers from ->-bleeped-<-. His argument falls completely apart when he references as one of his facts a crappy diatribe from Gender Trender, which I gather from a quick google search and a few friends that it's nothing more than an anti-trans site, as well as another couple articles that are garbage as well. After talking to a friend from UNC who's also trans and is getting a Masters for Sociology noted that "some gays and lesbians are transphobic because they fear that their existance invalidates their purpose". I trust her more than the guy.
I'm just having trouble coming up with a good response that he'll understand.