After ww1 the young turks, and other socialists, and communists came into the russian empire, and were exalted into high spots in the new communist system being set up there. These foriegn "comrads" began to torture and rape the local women they now were in authority over- this provoked the RED TERROR against them and it was nothing to see the NKVD round up these foriegn men and dispose of them.
WW2 broke out, and in the midst of it all, great German women were able to persuade their husbands to get hitler to stab Stalin in the back( he was at peace with hitler the early part of the war) and invade the russian empire and try to finish off these evil men. Men in love will do great things

So Hitler yielded to the German aristocrats, and invaded. This is why when the Germans arrived the first person they sought out was the local commisar of each town. They reopened Churches and were good to the local women, getting them relief from their torturer. Eventually, stalin recovered from the back stabbing and the rest is history.
So to explain the fight between germans and russians in one sentance it would say," it was a fight between woman and satan" or righteous women and evil men. (and it is a fight that continues to this day)
Consider all this.