Talking at them and condemning them does nothing. They're protected by the system as it stands - if split into regions, one can boycott, divest, and sanction another.
The only way we can actually beat the white supremacists is to cut them off from the outside world. Right now, they get to use the US economy - and Blue State taxes - to push their racist ethnostate vision. Once they rig federal elections completely, Pacific and Atlantic America will fuel their domestic repression.
Once the federal government is broken up, they're exposed to all the hate the international community wants to bring. A new alliance will form in the Red States between the sane whites who want a functioning economy and the urban voters who want the same thing, and also not to be murdered by police and kept from getting mortgages.