If you did a google search on "Nazis UFOs" or "Nazi Aliens", you would probably end up with over 5,000 results.
There's also a video game called "Nazi Zombies" and two horror movies called "Zombie Lake" and "Dead Snow".
There is a legend that the "Marcabs" and "The Greys" used Nazis to create super soldiers that couldn't be killed by ordinary means. This was to assist an alien invasion in 1945.
"The super soldiers" turned out to be programned zombies from Hitler's SS. "The Federation of Light" found out about these evil activities and infiltrated a Marcab Outpost on Earth to stop it.
There are obsessions about aliens, zombies and Nazis in some parts of humanity. No doubt, visions of these events surface from our subconscious occasionally.