Edit for context:
My view is transracial isn’t valid and this person is trying to dogwhistle. I’ve already blocked this person, and now they’re going after my friend saying my friend is transphobic because they disagreed with them about transracial being a thing (they’re purposefully leaving the context out so my friend looks transphobic when what my friend really said was transgender is valid but transracial isn’t)
I don’t know anything about this issue but apparently the presumption here is that your view is the right view and you’re just asking how to splain it to the person. My question is about the “I’ve already blocked this person” part. Instead could you possibly just limit your conversation to other subjects? It keeps looking like we’re all getting more and more isolated from each other as we develop extreme aversions to anyone not having our exact POV about everything, so we shove them out of our world. It reminds me of survivalist bunker mentality.