Ugh. May as well move this thread to the tinderbox now. I've been called a cracker, I laughed. It's not remotely comparable to someone being called the N word. Cracker doesn't have a long appalling irreversible history with it.
Where do I go to find this Racism Grading System you seem to be familiar with?
So some racism is "funny" and OK? And some isn't?
Is it OK with you if I find all examples of racism abhorrent? You can approve of the "funny" racism if you wish.