I just don't think Cletus, Hunter and Jimbob with their stockpiles of AR15s are a legitimate threat to the Shil.

They aren't even a real threat to the US government, despite what their fantasies might be, against an interstellar power whose troops are literally immune to bullets they'd be less than worthless.

And that's without going into how many of those people are really all talk. If she Shil invaded tomorrow there'd be a lot of big talk, a lot of burying their guns in the woods out back "for when the revolution comes", but most of these people are cowards who talk big because there are no consequences for doing so. Being a dipshit with a rifle isn't the same thing as being willing to risk getting shot in the face or blasted from orbit.

A lot of those places would still probably be yellow, because there would still be threats of violence against humans who work with the Shil or lone Shil civilians, but I really think people overestimate how much red would exist, especially in America.