I have a cousin who recently came out to me as a female to male transgender, but also gay, so he's still attracted to males. I don't think he's come out publicly yet, though.
I told him I support him, and we talked about it. He helped me understand some of the things that the OP talks about, but this thread has helped with some clarification on stuff. Also, apparently I'm the only one in the family who has told him I support him instead of insisting it's just a phase or something.
Still, while I support him, I can't say I totally understand the whole thing. Why does it matter what genitals you have? Like, for me, I consider myself a man because I have a penis. I consider myself a straight male because I'm attracted to women. I don't really understand what the difference is for my cousin between being a straight female and a gay transgendered male.
To clarify, I'm not judging, just trying to wrap my head around it. But I imagine it's just one of those annoying brain things that I probably won't ever understand because I've never experienced it. Like trying to explain depression to somebody who's never experienced it, or the concept of colors to a blind person.
Also I feel bad because I'm having a lot of trouble using "him" and "he" for someone I've thought of as a girl for his entire life.