I moved the big meta-level comment thread from "Yes Requires the Possibility of No" over to here, since it seemed mostly unrelated to that top-level post. This not being on frontpage also makes it easier for people to just directly discuss the moderation and meta-level norms.
Rationality is the common interest of many causes; the whole point of it is to lower the message-description-length of proposals that will improve overall utility, while (conversely, and inevitably) raising the message-description-length of other possible proposals that can be expected to worsen it. To be against rationality on such a basis would seem to be quite incoherent. Yes, in rare cases, it might be that this also involves an "attack" on some identified groups, such as theists. But I don't know of a plausible case that theists have been put in physical danger because rationality has now made their distinctive ideas harder to express! (In this as in many other cases, the more rationality, the less religious persecution/conflict we see out there in the real world!) And I have no reason to think that substituting "trans advocacy that makes plausibly-wrong claims about how the real-world (in this case: human psychology) factually works" for "theism" would lead to a different conclusion. Both instances of this claim seem just as unhinged and plausibly self-serving, in a way that's hard not to describe as involving bad faith.