So, all those people who used to express their anti-black by drawing pickaninny pictures and put on minstrel shows portraying blacks as fools and genetically lesser creatures -- were they just blowing off steam too?

Intolerance -- in any form -- is unacceptable.

If you want to have a rational discussion of why you think Islamic fundamentalism is a problem, be my guest. But that's not what these people are doing. They are cruelly, pointlessly, and self-importantly mocking someone else's beliefs. See my kosher analogy in an above comment.