The Helter Skelter scenario … white paranoia. I think it's morphed and changed into a whole gallery of Infowars enemies, from terrorists, to (antisemitic) New World Order stuff, to Mexicans, Russian bots, "thugs" and "gangs" …
There's a lot of different versions of it. But I think you're right, yeah. There's a sizeable constituency to which things like Trump's "Muslim travel ban" appear as a rational measure.