You cannot challenge racism, on this level, by being nice to and reaching out to white supremacists. Their entire ideology revolves around dehumanizing us. It just does. not. work.
You cannot fight fascism by prioritizing the feelings of fascists and letting them think they’re safe around you. You don’t “get them on your side”. Because treating them kindly and respecting them, gives them your silent approval and access to those of you who are way more vulnerable than you are and who cannot afford to feel safe enough to “debate” with these monsters.
Our humanity is not a question or a debate topic, and by giving these people a platform you legitimize their views and help spread them to a larger audience.