The answer is pretty simple. It can be found in the basic tenet (which is a lie) of communism; “From each according to his ability, to each according to his need.”
You get more stuff by asserting your need. You assert your need by asserting your status as victim. Victims need perpetrators from which the goodies are coerced. And so it’s very simple; if you’re in the business of looting, you go where there is the most wealth to be looted. That’s the U.S.