Thanks to Johno of Ministry of Minor Perfidy for this:

It seems that the number one google search result for the word Jew is a real corker about killing them all and such. That will not do. There's an initiative going around the weblog world to pepper posts with links to the Wikipedia page defining Jew, as I have done twice here, in an effort to googlebomb the judenhass back to their dark little Bavaria of the mind.

I normally think that googlebombing is childish, but I was shocked by what came up first when I tried a google search of Jew.