Read this article and mentally replace all instances of "Internet Explorer users, use Internet Explorer", etc with, say, "Australian Aborigine, be Australian Aborigine" and all instances of "Opera/Firefox/other browser users, use Opera/Firefox/other browsers" with, say, "Asian/Jewish, be Asian/Jewish".
And then tell me a logical, non-axiomatic reason why an observation about race is more inflammatory than an observation about browser usage.
EDIT: It has been revealed as a hoax, and I admit I didn't catch that the first go around. However, the point still stands: Why aren't people asking for Mr. Murphy's head? Let's say he'd created a hoax about one race being less intelligent than another, do you think he would have gotten off so easily?
Of course not.