"Northern Idaho" used to be shorthand for "extreme right wing" due to it being the location of the headquarters of the Aryan Nations and location of the Ruby Ridge standoff. Those references are over twenty years old now, so no idea how much that ideology survives there.
Even NPR's Maria Hinojosa couldn't find any "Nazi Town" in Idaho, as she had expected to. See the "Our Private Idaho" episode of "America By The Numbers":
https://shop.pbs.org/WC6542.html
Idaho (particularly northern idaho) is still nazi town.
Fun story, the guy from the oatmeal grew up in northern idaho and made a blog post about the nazis there.
https://theoatmeal.com/blog/bus