What they never taught you in kindergarten

In 1932 German elections the Nazis lost ground nationwide but actually gained votes in Berlin.  At the same time the Communists gained votes too, becoming the majority left-wing party in Berlin. I know that it might sound like an anathema, but the Nazis and the Communists are not that different from each other, after all the full name of the Nazi Party was National Socialist German Workers Party.  Both had the same enemies: religion, capitalism, and the bourgeois centrists ("rotten liberal weaklings").  And both were built on utopian ideas of a new world order. The Nazi world hegemony was to be achieved through the Aryan race supremacy,  the Communist world hegemony through the dominance of the working class.

After the elections of 1932 all pretense of fighting between the Nazis and the Communists was dropped, and they united in delivering the mortal blow to the centrists, effectively killing German democracy.  When the Berlin transport workers went on strike in November, Joseph Goebbels and Walter Ulbricht (the future General Secretary of the German Communist Party and a leader of East Germany) demonstrated together, and Communists and Nazis stood arm in arm, shouting "Red Front" and "Heil Hitler".  

Naturally, once the "rotten liberal weaklings" posed no further threat, the two thuggish parties commenced their own struggle for power.  Hitler emerged victorious, Ulbricht had to flee Germany (but not before getting rid of his own opponents within the Communist Party and turning them over to Stalin's NKVD), we know the rest.

Now, what was this I read in the NYTimes: after a brief reconciliation Hamas and Fatah are having clashes again?