one main factor that led to the holocaust and other campaigns of genocide was\n extreme racism.\n emergence…

Brief Explanations:

The Holocaust was a systematic, state - sponsored persecution and murder of approximately six million Jews by the Nazi regime and its collaborators. Extreme racism, specifically Nazi ideology which considered Jews as an inferior and dangerous race, was a fundamental cause. New religious groups emergence was not a factor. Desperate poverty was not the main driver as the Holocaust was more about ideological - racial hatred rather than economic desperation. The establishment of a central government (in the Nazi context, it was a totalitarian government that implemented racist policies, but the main factor was the ideology of extreme racism within that government).

Answer:

extreme racism.