But there are also nonbinary people whose beliefs are much more deeply held, and who feel intense, crippling emotional pain (i.e. are triggered) when referred to as their raised gender rather than their chosen gender.
Yes, people tend to have that reaction when faced with something that contradicts some aspect of the identity they've adopted (for whatever reason). I'm pretty sure creationists, for example, have the same reaction to people arguing for evolution.
What is something you used to believe, preferably something concrete with direct or implied predictions, that you now know was dead wrong. Was your belief rational given what you knew and could know back then, or was it irrational, and why?
Edit: I feel like some of these are getting a bit glib and political. Please try to explain what false assumptions or biases were underlying your beliefs - be introspective - this is LW after all.