Yup, I do react differently to different kinds of racism.
I find that I draw a distinction between malicious racism and racism that arises from something well-intended. At least, I do when they're directed at me personally. (I'm perfectly willing to get angry on someone else's behalf if they're upset.)
They're certainly both problematic, but I find that I can often laugh about someone's racist blooper but the malicious racism just pisses me off.
I'll be glad to tell the story, but only in person and not on line.