Mandela Effect/ Parallel Universe

The  Mandela Effect is a theory of parallel universes, based in the idea that because large groups of people have similar alternative memories about past events. Advocates of the theory claim that for these collective experiences to be true, the fabric of reality must have shifted at some point in the past, and that therefore not only do parallel, inhabitable universes exist, but that we are constantly switching between them  First observable inception of hijacking timelines occured in Germany in the late 30s, beginning 40s with the rize of the Nazi Regime.The Nazi Rise of powe brought an end to the Weimar Republic, a parliamentary democracy established in Germany after World War I. Following the appointment of Adolf Hitler as chancellor on January 30, 1933. After Hitlers appointment a group of Beings ,Claiming to be ExtraTerrestrial but in actuality are People from the future whom were living underground due to future climactic changes ,that forced them to live in underground bases which eventually became  their tombs. In search for genetic resources and a desperate need to change their tragic existence in their future , they travelled back in time. They offered Hitler Technology and knowledge in exchange for Genetic material and Historical inception.Thus the First notable Hyjacking of our timeline