You are exactly right, But it will not be a rehash of 1861-1865. Asymmetrical warfare is a b*tch. The invaders had best not imagine that they will be able to resume their happy lives when they are done. There may be no home to return to.
Exactly right.
It's been estimated that during the Iraq war, there were never more than fifteen thousand 'insurgents' engaged in active hostilities against U.S. forces, yet they managed to tie up our entire military for nearly ten years.
In the end, we left without achieving a real victory, and that country is now rapidly reverting to what it was before we arrived.
What sort of odds does anyone think the U.S. military would have against MILLIONS of armed American 'insurgents', fighting for their families, their homes, and their very freedom?