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Answer:
Politeness was brought by his parents.
Explanation:
Can you take a picture please?
There were many different restrictions. One was forbidding them to make any public appearances (they weren't even allowed to leave their houses). Another is forbidding them from marrying German people. They were also put into ghettos, and had to wear a Star of David on their sleeves so they could be recognized and shunned by everyone.
Is a subject for other time