Germany is the country that made the holocaust
Hitler, Germany.
Hitler and the Nazis were responsible for the Holocaust.
This question doesn't make sense. Do you mean "what was the cause of the Holocaust?" Do you mean "who was responsible for the Holocaust?" Rephrase the question.
Hitler.
Adolph Hitler
Hitler and the Nazis were responsible for the killing of the six million Jews and five million people they considered "undesirable".
Genocide is the answer.
The Jews targeted in the Holocaust were civilians.
Hitler
Adolf Hitler didn't have to be evil, he just was. He was responsible for the holocaust, and killed many thousands of Jewish people, so he is considered evil for his wrong-doings.
Hitler. All in all, it was Hitler.