One perfect example of human rights violation during World War II was the implementation of Hitler's "Final Solution." The goal of this program was to systematically execute Jewish citizens from all over Europe. This is considered a human rights violation because these people were innocent citizens who broke no laws and did nothing wrong. They were simply executed for their beliefs.
Another example would be the creation of labor camps. These labor camps made people work against their will. These individuals were not convicted of any crime. Rather, they were forced to work in unbearable conditions due to their belief system.