Question

Who was all in the holla cost?

Answer 1

The Holocaust involved the deaths of around 6 million Jews. Its perpetrators were Nazi Germany and its allies. You might have heard of Adolf Hitler before. He was the leader of the Nazi Party during the Third Reich and was Chancellor of Germany.
The Chancellor of Germany is the head of government of Germany. The official title in German is "Bundeskanzler" and is sometimes shortened to "Kanzler."
If you need more information, feel free to ask and I will try to help.

Answer 2

Anne Frank, Adolf Hitler and 100 of thousands of Jews