A simple need to "point the finger" led to Hitler's beliefs being spread. After WW1 Germany was left in a horrible state and the citizens were looking for someone to blame. This is when Hitler comes along spewing his anti- Semitic agenda and every desperate for a leader and someone to blame for their hardships follows Hitler without question.
kind is that belief when people are alive they should be happy by spreading kindness
Reductionism-the practice of analyzing and describing a complex phenomenon in terms of phenomena that are held to represent a simpler or more fundamental level, especially when this is said to provide a sufficient explanation.