What other races did Hitler perescute?

In addition to the Jews, many Gypsies were killed.

The Nazis also sent homosexuals, communists, pacifists and Jehovah's Witnesses to the concentration camps. They also killed handicapped people and later in the war some Allied PoWs and Catholic priests also ended up in the camps.

Russian PoWs weren't generally sent to concentration camps but had camps separate to Allied PoWs and were very poorly treated and died in their thousands in captivity.

Many of the people subjugated by the Nazis weren't sent to concentration camps but were rounded up to work in labour camps attached to German factories, and again, conditions in these camps and at the work-sites were atrocious so many slave workers died. These included Poles, Czechs and French.