Probably the most famous concentration camp was Auschwitz.
The Jews living there rebelled against their Roman reign. Emperor Nero decided that what they did wasn't okay, and he launched an attack against Jerusalem, the Jews' religious stronghold.
It turned into a slaughterfest of Legionnaires killing Jews and ransacking the city. This eventually led to the Romans burning down and destroying the Jews' Temple that served as the center of Judaism.
Generally speaking, westward migration had a very negative impact on the Indian's way of life, since a large majority of Natives were either displaced from their homes or killed in order to make way for white settlements.
Akbar the Mughal emperor of India approached religion during his rule with tolerance
