[Nate]

Wow. Ubiquitous. I've actually met one or two people who aren't anti-Semitic in my life.

Just to be clear; that was a joke.

Okay, deep and complex analysis coming up based on a class I took years ago:

There are three types of anti-Semitism: hatred of the land, the religion and of the people.

Hatred of the land is the simplest to understand. Some Muslims object to Jews laying claim to Israel, which is land that they see as theirs. This has only started happening in the last ~120 years, when Nationalistic Zionism started growing. Before that, Jews in Muslim countries were the most accepted in the world.

Hatred of the religion comes from other religions; primarily Christianity. There are two main perspectives on this:
a) Jews were supposedly Christ-killers and in one of the gospels the Jews were quoted as saying that Jesus' death would be on them and their children forever. Convenient if the gospel-writer was trying to promote Christianity to the Romans and lay the blame off Pontius Pilate. In any case, the Vatican put out a ruling that Jews today cannot be blamed for any actions that Jews in the past may or may not have taken.
b) Objection to the fact that Jews stubbornly refused to convert to Christianity.

Both of these have thankfully reduced in the last century or so, however they still sometimes pop up. The growth of the oxymoronic 'Jews for Jesus' is a sign of the second, especially as those groups are often run by non-Jews.

Hatred of the people is a lot more difficult to analyse. In many cases this is still a hang-on from the middle ages where in some cases Jews were a handy scapegoat for a ruler to blame or incite violence against. Note that in Christian Europe Jews were pretty much the only minority group. If you want specific examples I'll have to go home and look through my old books of notes.

Leading on from that, the stereotype of Jews being stingy or rich runs back to the first half of the last millennium when the Church decided that no Christian could become a moneylender because the Old Testament declares that no-one may charge interest to his brother. Jews therefore had no problem with lending money unless the borrower was another Jew so some became successful usurers. William the Conqueror actually brought Jews with him from France to help fund his new Britain. Because of this, Jews got an unpopular association with money.

In any case, the last two types of anti-Semitism have mainly shrunk in the last fifty years. The rise of anti-Semitism in Europe has mainly grown from either Extremist Muslims living there now or left-wingers thinking they are doing the Palestinian cause a favour by denigrating Jews.

There's a pile of stuff I've left out but I think that's pretty good for a ten-minute précis.