Again, your "disruptive customers" is a load of hooey. Advocating white supremacy does not interfere in any way with DNS registration. If you run a cake shop and refuse to talk and eject people based on sexual orientation you will be in the exact same boat as Masterpiece Cakeshop, because it doesn't matter if you are refusing to make cake, or putting up targeted ToS, or simply put "Whites Only" sign on the door - you are still discriminating based on protected characteristic.

For your argument to be valid you need to demonstrate that refusing to register DNS for supremacists is substantially different from refusing to bake a cake for homosexual wedding. Let me suggest possible approach - you could argue that homosexual couples have no control over their sexuality, while supremacists could choose to abandon their ideas. Such argument would be a lot more coherent than what you are trying to do.

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