You are retarded.
First, most of these expulsions occurred in climates where all citizens were asked to convert to a single religion and the Jews had the strongest backbone and wouldn't cave in.
Second, many people were bothered by the notion that Jews considered themselves the "chosen nation." For obvious reasons this incited people but for Jews, that notion was a passive one.
Third, for whatever reason, Jews in general have tended to be super successful in business, science, and other fields. This bothered people.
In olden times there were no democracies, or "equality under the law". This is a fairly novel ideal created by America 250 years ago. Numerous other ethnic groups have been wiped out over the centuries for not conforming to the ways of their mother country. This is why having a Jewish state is so essential.
Last, this idiotic question you ask would be equal to asking "Why every country used to enslave black people. Was every country racist? Or was it really the blacks fault?" You fuckin ignoramus.
All this talk about Jews lately, what I can't get my head around is why they have been kicked out of 109 countries. What was the main reason this happened in all those countries? Were they all just ignorant anti-semites?