I'm not sure of this instance, but I've seen stuff like this before from actual trans individuals. They seem to think that if a man doesn't find the concept of dating a trans woman likeable, then that man is a bigot, and all about hate.
Prejudice is an interesting concept - we all have prejudice in us, whether we want to pretend to or not, especially when it comes to attraction. Everyone has a type. Everyone has preference. If you're a 30 year old male, and don't find the concept of dating an 80 year old female, then you're technically an "ageist". What about a 600 pound male who gets turned down by a 21 year old female? Weight discrimination! Its all about subjectivity.
You can discriminate against a 600 pound individual, and most people understand it. But if you're white and don't want to date a black man or woman, then you're suddenly racist.
You and I differ politically on a lot of things, which is fine - that's what makes the world go 'round, as they say. But I'm sure you see this as a fringe element of the democratic party being ridiculous - and I would agree. That's why the thread is labeled "Progressive Stupidty" and not "Democrat Stupidity".