The tragedy is, it works, and always has. Capitalism has always benefited from racism, that's why Marx called racism something based on "false consciousness", rather than an authentic sense of class consciousness.
Trump got this kind of fear going in America again. It went so far that many today think the foreigner got the cookie and even brought his parents who were immediately set up on social security. Not possible but things like this are used to set the stage to get rid of and eliminate our benefits. Divide and conquer here that so many believe.