> So why is it that Jews are hated? My best guess would be that Jews are
> blamed for the death of Jesus Christ, right?

Oh, it started long before that.

A lot of Jewish tradition -- including keeping kosher -- is either explicitly or implicitly intended to keep Jews distinct. Even when you get rid of the language about commandments, one major recurring theme is "we are different from everyone else because we do these things."

(I included this in a message on an anti-spam list. Do you know why?) Bodhidharma sat facing the stone wall. The Second Patriarch of Chinese C'han (Zen), Suika, stood long in the thick snow. Finally, Suika severed his own arm and presented it to Bodhidharma. He said, "Your student cannot pacify his mind. You, the First Patriarch, please, give me peace of mind!" The First Patriarch replied, "Bring that mind, I will calm it down!" The Second Patriarch said, "I search for it everywhere, but I cannot find it!" Bodhidharma replied, "I have already pacified it for you!"

We geeks could come up with a taxonomy of spam types and then spend years arguing worseness, but in the end Grandma is still more likely to complain about something she finds offensive -- no matter how it got to her mailbox.

Expand outwards from that concept, and you're probably going to prioritize things a little differently than if you start with a focus on the sending technique.