When the Red Army overran Germany they stole everything that wasn’t nailed down, then got a crowbar and pried it loose. War correspondent A. J. Liebling described the Soviet Army as a horde more than a proper Army. Every German woman between 14 and 80 in areas controlled by the Russians was raped repeatedly. Suicide was virtually unknown in Germany previous to the Soviet invasion, especially among young women. After the Soviets overran eastern Germany, there reports of tens of thousands of suicides by young women.
The rape and pillaging is Darwinian survival of the fittest and is old as humanity.
The cross breeding of the slav and cossacks into the German gene pool has produced a current population that is docile and unwarlike. The fit have prevailed.