I put this in the comments but I figured I'd put it in reblogs too
I think what anon is referring to is not the coining of the term nonbinary itself, but instead the person who made the nonbinary flag. Here's one of the posts stating why they pushed for the term and flag.
#we can't have anything focused on our mascness and all more general trans terms ('egg'/'t-slur'/'t4t') all actually Belong to trans women#we're chock full of cooties and if we use the wrong words or try to make our own we're just gonna infect the trans community with them
can I add just remember non-binary got made because “too many” afab genderqueer people were in the tags so it was made for amab ones.?? Still don’t know how any of that worked but I will never use nb over genderqueer after finding that out
I was trying to look into this but couldn't find anything indicating that. Would you mind sharing where you heard that from? The term seems to have been coined on its own but not popularized until the 2010s or so; I wouldn't be surprised if negative sentiment towards people afab identifying as genderqueer heavily contributed to that popularity considering how certain people have talked about us. But I'd still like to find that information for myself if you have any direction towards it.