Did you actually read the above posts? HC didn't state a simple sexual preference, but instead stated that good-looking transsexuals are "scary" and that he would be horrified he might have touched one without knowing it. That goes well beyond a preference to transphobia -- just like there's a difference between heterosexuality (preference) and homophobia (bigotry).
Emotional/pleasurable reactions cannot be controlled (and thus cannot be good or bad), but the conclusions we draw from them can be. A knee-jerk distaste from the thought of a transsexual is one thing, but saying how scary they are is another.
Interesting question: is there any meaningful distinction between a transsexual-female (a trans who had surgery to be fully female) and a female with breast implants or all sorts of other cosmetic surgery? I can't think of one.
Interesting question 2: is there any meaningful distinction between "trans-females are gross; I would never sleep with one" and "black/white/Asian women are gross; I would never sleep with one"? If anything, I would argue that the latter is a bit more justifiable (though not very reasonable), as at least there is some obvious physical distinction (skin color) and aesthetics is an obvious part of sexual desire.