Good question as to why Jews have been persecuted for 2,000 years. I think some of it was attributable to early Christian propaganda, trying to curry favor of the Romans. Later, in Medieval times, many rulers were indebted to Jews for loans of money acquired because they were exempt from the Catholic church’s prohibition against usury. They were expelled from England in the 12th century and Spain in the 15th by monarchs who could (would) not repay such loans. European Jews seem, therefore, generally to have been better off than the typical uneducated, ignorant, superstitious, jealous and violent peasant. So, there was that. If your plan is to eradicate these people because their skin is a lighter shade than yours, then consider getting more sun because there may be someone who is offended by your lighter skin color.