Because it was a Mass Slaughter of a certain race or group of people
The Holocaust
He approved of the Holocaust and was the one who made the Holocaust happen.
To remember the Holocaust.
Holocaust was not a person
The Holocaust is a concept not a person.
The Holocaust wasn't a war. Please see the related questions.
One aspect of the Holocaust is murder, there was a lot of killing in the Holocaust.
The Holocaust is over
The Holocaust started in Europe.
There were no elections in Germany in the Holocaust.
Holocaust victims.
she was a girl in the holocaust