The Holocaust was a watershed event in human history. In the aftermath of World War II, the world—from individual nations to the United Nations; from religious leaders to professionals in fields as diverse as law, medicine, and science; from presidents and prime ministers to private citizens—confronted its legacy. Many of the issues raised by this cataclysmic event continue to have an impact on our lives and the world in which we live.
Most dictators have concentration camps which is unfortunate. For example, during the Russian Revolution there was a concentration camp called the gulag. Also a current country that has concentration camp North Korea has them too. Both aren't weren't as bad as the holocaust but it's terrible. The holocust has estimated to have kill millions of disabled people, gay people, transgender, and most of all Jewish people. This made other countries wanting to defeat Germany, so they can rescue these poor people, hope this helps.