The Nazis killed anyone that wasn't exactly like them. They didn't just go for the Jewish people. They also attacked: Jews, Roma and Sinti people and black people. Slavic people, such as those from Poland and Russia.
The Nazis also wanted to ‘improve’ the genetic make-up of the population and so persecuted people they deemed to be disabled, either mentally or physically, as well as gay people. Political opponents, primarily communists, trade unionists and social democrats, as well as those whose religious beliefs conflicted with Nazi ideology, such as Jehovah’s Witnesses, were also targeted for persecution.