I actually agree with you somewhat. (Well, the first line, not the second.)
There are some pretty terrible things said about trans people in threads that pop up on here, but unfortunately, sometimes the pro-trans side doesn't really do the argument any favors with the way responses are dealt out. Sometimes, what should be "let me try to make you understand why you shouldn't feel that way" turns into "let me punch you in the face and say how terrible you are for feeling that way"and people who get punched in the face and told they're wrong aren't always willing to listen to the other side's opinions.
It can be hard to tell, for example, when somebody is using pronouns incorrectly because they honestly don't fully understand the topic, and when they're just being an ass about it. It's not fair to jump on everybody equally, though. The whole transgender thing can be very hard to understand, and somebody not understanding due to lack of exposure doesn't make them a bad person.
At the same time, you also can't totally blame the pro-trans side. Every time the topic comes it, threads can easily fall back into the same arguments over and over. So, after a while, it can feel very frustrating and defeating to have to start the exact same argument over from scratch for the 100th time.
Conversations like these should be less about stupid bickering, and more over spreading awareness. When we decide to break ourselves into "sides" in threads like these, then the potential for something good to come out of the conversation is automatically reduced.