The conservative refrain

The most recent refrain being utilized by conservative pundits is to preface something awful they want to say with something like this:

And I know, I know. Liberals out there are going to be all over me for this because it must be racist, but…

And then the pundit proceeds to say something racist. Just today I heard some conservative host going on and on about Kwanzaa being a fake, awful, evil holiday that shouldn’t be celebrated. Why, heck, if blacks want to celebrate something, they have the WHOLE month of February! The guy even managed to have a real point here and there, but he covered everything he had to say with racism.

I guess I just don’t understand how saying “I’m not racist” makes it okay to then say something racist.