I suggest conservatives use this on every single liberal you know - especially college PC liberals.
Just tell them you are the same as them. Point out that they believe conservatives are racist bigots, but that the standard for racist bigotry has now been declared by a black professor. And since you have not given all your money to black people, and that they have not, and are not going to, give all their money to black people, then you are both racist bigots.
Then look them straight in the eyes and ask, "would you like to be known as a racist bigot, or a conservative"?
Keep looking them in the eyes.
Then tell them, "I'm waiting for an answer."
They’ll either pee their pants or the air pressure in their craniums will cause a spontaneous explosion (or both).