You don't get it, man. You are attacking a fundamental piece of my identity and expecting me to be "nice" about it, as if parts of myself that I know unequivocally (and that have been backed up by years of scientific studies) are something that you can just debate without consequence. As to why I think you support it, the title of this post is "Shake it up. Offer up one somewhat unpopular opinion that you hold.", emphasis mine, of course. So if you don't hold the opinion that trans women are not women and that trans men aren't men, then why did you say it? Unless you don't understand that my being a "victim of the patriarchy" is a direct result of you holding that opinion, I can't see why you're surprised that I "misunderstood" your statement.