What similarities existed in the two countries that allowed the nazis and the khmer rouge to gain power?

The political unrest and economic instability of the 1920s and the 1970s provided an opportunity for extreme political parties to blame more-moderate political parties or the ruling government for either not doing enough to solve the country’s issues or for causing the problems in the first place. In both 1920s Germany and 1970s Cambodia, these circumstances allowed these authoritarian groups, the Nazis and the Khmer Rouge, to climb to power.

i think its provide for the common defense