I'm pretty sure the answer is indigo. If I'm wrong then I apologize.
Answer:
Nazis were outright extremists. What set them apart from the other extremist parties at the time was hitler's language and volume of his speech.
Explanation:
Hitler was known as a hotheaded politician since he was quick to anger and swore a lot during his speeches. The Nazi parties' popularity grew and grew to the point where you could only choose from the communists and the nazis. Since the communists were already feared (because of the red scare) many turned to the nazis
Difference in opinion over who should lead the Muslim community following Muhammad (pbuh) death.
