Why did the Nazis target several groups for persecution?.

The Nazis considered the group to be inferior.

The Nazi's believed that they were the superior race.

Explanation:

Nazi's were known to be very demandings and cruel towards anyone who didn't fit Hitler's 'perfect criteria' (blonde hair, blue eyes; aryan race) Essentially wiping out everyone who wasn't like this was their master plan to make the perfect race and keep it that way. Fortunately, this perfect race plan did not work.

c) troops march forward in close formation against newer, more accurate weapons