(mn regular, FWR regular, namechange for this thread only)
It sort of feels like these two terms "Gender Critical" and "Non-Binary" can't possibly apply to the same individual because if you are Gender Critical then that intrinsically means understanding everyone as non-binary.
Most people in my family are autistic, including myself and my child.
I consider myself GC. I don't have a gender identity, but if I did believe in gender as a thing I would be non-binary because I certainly have no female gender identity. But although I am not cis I have never considered using they/them pronouns myself because it seems to me that doing so is rather a way of confirming that male and female sexist stereotypes are true and appropriate for most people, indeed for everyone who isn't they/them - and that seems wrong to me.
I have brought up DC in as un-sexist a way as possible. I have always said "gender is sexism". But the world is still very sexist.
DC (male, age 13) wishes to identify as non-binary and use they/them pronouns. They are clear that they understand themselves as male, have no wish to deny that or change their body, but they think that this will distance them from the sexist male behaviour of the majority of boys they see around them - they think that this move will put them in a different category and consider this to be an important way to express their non-sexism. It's a totally different view point to my own.
They don't want to talk about it and don't want my advice. My feeling is that they think they can make this change to avoid sexists making sexist assumptions about them but I don't think the world is going to be kind like that. People will make even more assumptions about them as a person who asks for they/them pronouns.
I know that I can't talk them out of this, and that my role is to love and accept them for who they are, and that we don't have to agree on this. We already disagree on many things (matters of vegetarianism or otherwise, matters of the existence or otherwise of a deity/deities etc).
I also know that if they reach out to other pro-gender-ideology people or groups in the hopes of finding understanding and people with a similar mindset they are going to encounter points of view that are much more sexist and unpleasant, including groomers and abusers who use the trans umbrella for disguise. I am frightened. Are there any organisations or forums which focus on teens who are trying to make sense of all of this which try to create a space where a GC understanding of biology and a non-binary kind of self-expression can coexist?