I view this as the same as accepting the pronoun change for someone who is transgender. You knew them one way, and now you make the change with them to the new pronoun.
I know it can be tough but here is my expanded assessment.
When people are brave enough to ask for this kind of recognition. When they risk ridicule. If I want to be respectful and caring then it is on me to give them the respect they deserve as a fellow human being no matter how I pass judgement. This niggling over words when we spend so much time battering each other over differences that mean nothing, really, where is compassion in this set of circumstances? As a Buddhist I go straight to compassion.