akuperma,
They are not a serious threat.
Say that to the fact of any Jew who has been the victim of an anti-Semitic attack. And yes, anti-Semites dwell on the far left as well as the far right. Doesn’t mean white supremacists are not a threat.
They should be seen as similar to the “flat earth” society.
Maybe if flat-earthers were demonstrating with torches with chants of expulsion to the round-earthers.
The American right has long been well intgegratged with non-white and Jews. In the southern states, one finds African Americans being elected with support from the “old stock” (meaning descendants of the Civil War losers) whites. The conservative Christian groups are ethnically and racially integrated.
This is so head-scratchingly wrong that I wonder if you have ever been to the South before.