You'll want to read this one. It's titled Anti-Semitism: Integral to European Culture, by Manfred Gerstenfeld; Front Page links to it. It's a long article, twelve pages; the link is to a PDF. It is worth every second it takes you to read this.
And while we're on the subject, here's Victor Davis Hanson explaining a few of the basic ethical differences between the Israeli government and the terrorists.