Racism is hilarious and usually accurate.
He's right.
Y'know why here in Australia we assume that an aboriginal person spends all his money on beer, hasn't worked a day in his life, and rips the floors out of houses?
Because 90% of them do. Oh sure there's exceptions, I know a judge in the court system who is aboriginal and an upstanding citizen himself, but most of them aren't.
Just look at it this way: Cliches because cliches for a good reason.