They WANT mass casualties.
Helps their goals in a number of ways.
They have also conditioned the populace in a list of ways to be exceedingly passive even in the face of tyranny and horrifically bloody gore.
They may even have chemical and other artificial means to enforce passivity in various sizable locales.
Add in their use of massive gang crime waves coordinated by their folks . . . massive illegal alien help . . . massive help from Mexicans and Chinese just south of the border and flooding in from container ships off the West coast . . .
. . . things are not as tidy and safe as many ASSUME.
If there was that much chaos where there were mass casualties, they would lose their army quickly.
People in the Army are human. They have families. Many, probably greater than 50% would bolt.
Heck, twenty million troops in America would only amount to something like 8 per square mile. 8 per square mile would have trouble taking over a Wal-Mart!
I’m not disagreeing with you that some may WANT to do it. Or that SOME plans might have already gone in effect. I’m just talking about the feasibility of them doing it successfully.
And I don’t see it.