Racism

Why do racists always feel the need to point out they're not racist, usually immediately preceding a racist statement?

Surely if you're racist and you're not ashamed of those views you should have no problem admiting it? (I myself hold many unpopular views, though racism is not among them.)

But if you're racist and afraid to admit it, wouldn't that be a clue that you need to reevaluate your perspective?

Just a thought.