As a result of discrimination during the 19th century, where were many Jews in eastern Europe forced to live what?

During the Holocaust, where Hitler tried to gain power over the whole world, he thought that Jews were creating all the worlds problems, so he forced them to live in concentration camps, and would even kill them. They would be cramped together, with no medical attention, and separated by gender as well.

As a result of discrimination during the 19 century, the jews in eastern Europe was forced to live in industrial areas