@BillW,
If your statements are true, they can be used as premises in another argument.
You believe:
1) if you support a white supremacist, you are one
2) Trump is a white supremacist
We know:
3) one third of Americans support Trump (that's a fact)
We may conclude from the facts and from your beliefs that a third of Americans are white supremacists. They support someone who according to you is a white supremacist, and so, also according to you, this makes them white supremacists as well.
Is it ridiculous to claim a third of Americans are white supremacists? Of course it is. It's also ridiculous to hold beliefs from which that claim follows.