For starters, racists, like all bigots, aren't very bright. However racists think they're smart, very smart, and that anyone who calls them out is not smart. You see, to racists, unless you go around dropping the "N" bomb, you can't possibly be a racist! And they have tons of lameass "defences".

"Uggh, everyone race-baits nowadays."
"I'm not a racist, but..." or "I don't mean to sound racist, but..."
"Conservatives can't disagree with anyone without being called racists!"

And my personal favourite: "Psh, I'm not a racist, I have black friends/family/co-workers."

I've heard every one there is, but let's be real, when you parrot white supremacist talking points, and turn into a rabid screech monkey when someone calls you out on it, you're a racist.

"I'm not racist, my shadow is black!"