The nature of the people who carried out the Holocaust were deemed the nazis. These were group of people led by Adolf Hitler whom was the prime dictator of Germany overtime. Hitler came to power by feeding off people's need for revenge and redemption after the saddened defeat which was put on by WW1. Understanding the large debts and ridicule put on by the WW1 treaties, Hitler made the people believe again. However, once in power, it was too late.
The Nazis carried out the holocaust on the basis of redemption. They seemed to try and make themselves "pure" which was strictly non-jewish and based on the grounds of being a proud German. Many nazi soldiers come to admit they did not believe in the acts they were performing as they were solely carrying out orders given to them. This deems them as receptive ad very admissive to those in power.
As stated before, the need for redemption and the goal to be the best were the main reason the holocaust was so successful. Many Germans did not even think to retaliate or say anything as they were put in fear they would placed in the concentration camp with the Jews. Fear was driven into the German people and the rest of the world. Unsurprisingly, one of the most beneficial factors of the success of the holocaust was the secrecy of what the Germans were doing the entire time. When Americans first discovered the camps at the end of the war, they were shook with distraught as they were clueless of the horrific acts being performed over the war. This was a factor of success as the Germans knew they could not be stopped if the rest of the world did not know what they were doing.