In my capacity as a teacher, I've had occasion to answer the question, "Why did people hate the Jews?" (It's come up multiple times, even though I'm supposed to teach physics and math. I'm glad they're curious, I guess?) I feel like I can give a pretty competent response. Basically, my current knowledge of the history of anti-semitism is well summarized in the upvoted comments in this thread and this thread, both a part of your lovely FAQ.

Although I can do a very good job of convincing a high school student that I understand anti-semitism, I definitely don't feel like I do. I feel like there's a HUGE step missing between, "Jews were mistrusted because they had a trans-national group loyalty" to "Anti-semitism is an important part of nearly every hate movement in the western world....and this is all in spite of the fact that the entire history of the Jewish people is that of being discriminated against and oh-by-the-way, more than a third of them were killed between 1930-1945." So, I want to find something more-or-less comprehensive that will help me fill in the gap.

I think my first stop will be rereading the first section of "The Origins of Totalitarianism" by Hannah Arendt. But I don't know where to go from there. Some Googling has made the following books stand out: "Constantine's Sword: The Church and the Jews, A History", "A Convenient Hatred: The History of Antisemitism", and "Anti-Judaism: The Western Tradition". But, before I dive in, I'd love to get the opinion of someone more knowledgeable on this topic than I am.