Who else took part in the Holocaust?
Not only did the Nazis take part in the Holocaust, many others took part. Newspaper publishers published anti semetic propaganda for the citizens. For example, Julius Striecher. Teachers taught children that Jews were mean, nasty and gross. And that you shouldn't come in contact with them at all and that they are the enemy. All of the citizens were brainwashed.
the Nuremberg trials or alternatively the Nuremberg trials took place after the Holocaust. There were no famous trials that took place as part of the Holocaust. There were many trials of German servicemen during the Holocaust and there were many famous trials during the time period of the Holocaust, for example the conspirators of the July bomb plot.
It would be helpful if you would explain how you think Jews '[took] part in the Holocaust. In the ghettos that the Nazis established some Jews were appointed by the SS to run the ghettos. Initially, they hoped that this would be better than being run directly by the SS. I wonder if you hyave anything else in mind.
There were many people who were part of the Holocaust. There were many who were persecuted, the Jews for the most part, but also the disabled and whoever else the Germans saw inferior to themselves. Adolph Hitler and the Nazis were also part of the Holocaust. Hitler believed that the Jews and Comunists were the reason for all of Germany's problems. As a result, he told the Nazis to get rid of the Jews.