Re the Nazis and Communists in the long ago world of Germany pre-1933, it's difficult to actually characterize the Communists as the ones reacting against the Nazis in the years of fighting and murder that went on in that country.  The Communists were already well established and agitating for revolt across Europe after the USSR was established, the Nazis arose in Germany as a nationalist alternative, fuelled by the rage many Germans felt at their humiliation after the WW1.  

Analogies between that time and current white supremacists and the 'antifa' people are deeply misleading and the players a bit delusional if they're casting themselves in the roles of those long ago antagonists.