Yeah, noticed a lot of hate for transpeople. Don't understand that.
If you lurk around for a bit, you'll find that the majority of their experience with transgender individuals is with, from their perspective (and you can argue otherwise if you want, I'm not getting into that discussion), unrepentant assholes who happen to reside on Tumblr. Dragondicks is the main example that comes to mind, along with the ever popular idislikecispeople and purplekecleon.
You will also notice many people there claiming to be trans themselves. Your mileage may vary on whether that's true or not. Again, I'm not getting into that discussion.