You're trying to white knight GC here, even though I'm pretty sure you know that he did misrepresent the argument. And, yeah, it's predictable that if people misrepresent an argument, they'll have people saying that they are misrepresenting an argument.
Again, not if you represent the arguments honestly. Climate-science denialists are making an objective claim about the world--either that climate scientists are collaborating on a hoax to fool the public into thinking that the world is getting warmer (or that the warming is due to human activity) or that they are missing something obvious. In this controversy, you're not seeing differing factual claims--it's just about the meaning of the word "gender" (you're insisting that it should be changed to be identical to sex, while others think that it is convenient to have two different words to refer to different things).
No one has to do anything. There's no platform calling for legally enforced politeness. You're free to call transgendered people whatever insults you want to call them. Even if you're among the 70% of college kids who know what "gender" means, you can still hate them, shout at them as they walk by, write screeds about how awful they are, whatever.