this is SUCH a stupid concept of people not being satisfied with reality, so they create some big elaborate story in thier head
think of it......they needed alien secrets to get basic rocket technology???
aliens capable of time travel, or interstellar travel; which would require warp speed and worm holes would be SO far beyond remedial fossil fuel powered rocket technology its stupid.....it would be like our modern military showing a caveman how to make a bow and arrow ( we can make stinger missles for christsake, why would we need to show them a bow and arrow)
if the germans were commiserating with alien life forms......they would have came out of it with somethign better then a rocket that couldnt come withing a hundred miled of its intended target and usually blew up on the pad......they would have had time machines or have been given the knowledge fo some new fuel source
people just like living in fantasy land......cause fantasy land is more fun