Policy of extermination of differing ethnic, religious, or racial groups.

a. Genocide

b. Genome

c. Generalizations

d. Appeasement

This is called genocide.

Some examples of Genocide include Holocaust (the regular killing of the Jewish population in Nazi Germany), Genocide in Rwanda and of Armenians in Turkey.

Appeasement was the policy of giving Hitler some of the things he wanted to avoid an open war in the 1930s.