when you insist that bisexuality is transphobic with that “bisexuals are only attracted to men and women” crap, you yourself are being transphobic by suggesting that trans women/men are in a category separate from women/men
trans women are real women, trans men are real men, and bisexuals can be attracted to all sorts of genders
stop reciting dusty dictionary definitions of bisexuality (which were, by no accounts, written by people who understood MOGII folk) to actual bisexuals and go evaluate your life choices
Basically, I self-identified with bisexuality long before I ever heard of pansexuality. I’m still not quite sure what the difference is, but I don’t see a reason to change my label. Some people feel more comfortable identifying as bi and some as pan, and no one should have to justify their sexuality to anyone.