Nazi mandated Star of David; Wikimedia Commons
In September 1941, all Jews over the age of six in the Third Reich and the ethnically Czech Protectorate of Bohemia and Moravia were required to wear the Star of David with Jude (Jew in German) inscribed in faux Hebrew letters. This requirement was subsequently introduced in other German-occupied areas.
Although the Nazis reinstated it, this practice was not new. Since medieval times, in both Christian and Muslim countries, persons not of the dominant religion were often required to wear badges, hats, bells or other items of clothing that distinguished them from the majority group.
I read somewhere that prejudice and scorn of the sort that was directed towards Jews arose from wealth and position without power.
This argument was also used to explain the hatred of the French monarchy during the Revolution once it was perceived that they no longer held power.
The argument is that special position with power is OK otherwise there is hatred.