heh

With the accumulation of wealth comes power. Now this power comes with caveats. As during these times the divine right of kings was in full swing. Therefore the monarch could largely do as they pleased within reason. So long as the monarch didn't confiscate wealth or lands from his more powerful subjects they would be able to reign freely. Jews in many kingdoms weren't considered subjects but rather foreigners. Therefore these rules didn't apply to Jews. Monarchs could and often would confiscate land and wealth from Jewish people within their lands to supplement their holdings. In doing so the monarchs would often resort to scape goating in order to make the jews to be an enemy that needed to be eradicated as a means to confiscate their wealth. Jews with better connections at court could be left alone. This is where the "sneaky jew" concept arises from.

Jews also received large amounts of animosity due to the distinct difference between Christianity and Judaism. Christianity is largely a convert heavy religion. Those who aren't Christians are often pursued by Christians in order to co very them. Judaism is entirely different. Judaism is often very hostile in the ability to convert. This being said jews would always be a minority in whatever lands the occupied making it easier to use them as a boogeyman to farm resentment. The jews to many Christians throughout early Christianity and into the medieval era had very odd practices that would rub them the wrong way. For example during the black plague jews would, relatively, fair better than Christians. This has been attributed to the common practice of regular bathing that the jews practiced during that period. Due to the bathing and overall cleaner living conditions jews didn't catch the plague as often. This lead Christians to assume the jews had started it all.

This often where you get the pogroms and things of the like. This predominantly focused on europe as I'm more familiar with this side of the story. Jewish hatred in the middle east comes in more of a modern flair. During the Persian empire and subsequent empires throughout history jews would be tolerated. As with europe they would never be the majority. Jews would often be more permissible in court in middle eastern kingdoms. This would change from time to time and ruler to ruler but things would come to a head after ww1. The British imperial administration began seeing the potential of a Jewish state existing in the holy land favorably. Some of this being a good will gesture and some being part of the "rich jew" stereotype. A Jewish state that owed its existence to the British empire would be seen by jews in Britain as a godsend and would be more loyal to the empire. After ww2 this state became a reality. In doing so the brits helped move large numbers of jews into the holy land.

This tipped the scales in a way that had never happened before. The jews being the majority did what the majority does in all nations. They make a state in their image. Muslims and Arab states didn't view this favorably as a lower class of people had now controlled what had been there's for 1000's of years. It was a region of major importance to their religion. This culminated in several wars and proxy wars throughout the Middle East and Africa into the modern day.
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None of the above is a justification for anti Semitic ideology. It's a brief summation of what I've seen and read over the years in regards to the "Jewish question". Anti-Semitic people are awful. Imo the best way to combat hate is to confront it. The best way I know how is to provide nuance. From the things ive read this is how anti-Semitic "historians" and people's of yesteryears viewed jews.