"Documentable" evidence? What are you talking about? If my friend is fear-mongering about the great replacement and advocating for remigration, I'll have no trouble saying, "this is fascism." I don't need documentation.
Understand the difference between sex and gender. Sex would be objectively false. Sex is mostly binary. Gender is not because gender is a construct. It's cultural. Sex means you were born with specific parts. Gender is how you identify yourself. "Girls wear dresses" is a statement about gender, but gender is fluid. Men used to wear dresses. They used to wear makeup. There are cultures where women are the hunters. What was once masculine is now feminine and vice versa....because gender is a construct.