Why did the Nazis establish the Ghettos in Europe?

Answer 1

So that there was a place to put the Jews.

Answer 2

Briefly:

Anti-semitism became a serious problem in places such as Russia, the Ukraine and Poland beginning in the late 1800s and Jews experienced continued outbreaks of persecution. They immigrated to other places in Europe. Judaism encouraged Jews to live in close proximity to other Jews and to their synagogues. However, they were free to come and go to other sections of towns as they pleased. Jews continued to live in particular areas of towns even when they weren't required to. These were often the worn down, decayed sections of towns and cities that were called ghettos. Not every town had a ghetto.

The Nazis commenced a slow, systematic persecution of the Jews that included forcing the Jews to remove themselves from villages and towns and other sections of larger cities and move into designated ghettos where they would form a concentrated community that could be controlled and exploited. The Jews no longer had freedom of movement. They were prisoners inside the ghettos.

Hitler's plan was to exterminate all Jewish people. The purpose of the Nazi ghettos (which were nearly all in Poland) was to gather Jews together, make them work for the Germans, and ulimately to kill them. They were in effect 'holding points' pending the last stage of the 'Final Solution'.

Answer 3

because they were horribly violent and stupidly racist inhumane scums