These people don't have to be told a damn thing. They suspect the worst of the best, the best of the worst, and when it comes to 'others' they have nothing but scorn, even if it's completely baseless. It seems to be a kind of narcissism.

"Good people can't be good because I look bad by comparison. Bad people are good because I look good by comparison. Other people don't look like me at all and so we must assume the absolute worst..."

To be fair though, I don't know how we can sustain illegal immigration of low income workers.