I was somewhat oversimplifying too. However, there is a group on the right wing that is definitely using the politics of divide and conquer so they can hold on to their power and continue their pillage of both the world at large and the american taxpayer via their control of and interests in that good ol' military industrial complex.
And Arkadiy, they are murderous; they have to keep the killing going to justify the continued pillage. The fact that they don't do all of it themselves doesn't mean they don't have a strong strong interest in seeing it continue for as long as possible.