What marriage example?
Let me try and explain the distinction again, because it's an important one to grasp if this debate is to go anywhere, and it's pretty clear you're not grasping it.
Case 1: You meet a woman at a bar. She's flirting with you, but you don't really find her attractive. You're just not feeling it, so you wish her a good evening, say it was nice to meet her, and walk away, and then later on you find out she was actually a transwoman, and you think, "Oh, maybe that's why." - NOT BIGOTED! YAY!
Case 2: You meet a woman at a bar, she's charming, intelligent, funny and sexy. You really really really want to take her home. Then you find out she's a transwoman, and you're suddenly not interested, even though you were rarin' to go a minute ago. Now, obviously you have some sort of hang up here, and if the hang up is entirely predicated on her status as a transgendered person, how does that not qualify as anti-trans prejudice? I mean, to give an analogy, if the big turn off fact was that she was jewish, and you say "well I thought she was really sexy and I wanted to sleep with her, until I found out she was jewish, that's just a big turn off for me." If that's the case, you might want to consider the possibility that you're kinda anti-Semitic.