Nightmare - or Flashback?

Back some years ago, I had a nightmare that I will never forget. I really don't think it was a nightmare in the sense of a symbolic working of my psyche to work out my emotions. I think it was a memory from another time. I haven't tried any past life regression to discover the era, but I've got a big hunch it was Hitler time. I won't reiterate it here, because it was too horrid even for me to repeat. It's a memory that makes me want to throw up and cry. I was helpless. Others were helpless. Small children were being murdered in ways you just wouldn't believe. I don't know what sort of brainwashing made those people do those things. Evil. It was a time of evil rising. It was a time to bring evil forth in a weak nation. Perhaps the result was a stronger nation. Perhaps it was just a wrench being thrown in the gears of an old, boring clock. I have no idea. It was horror. I just read a blog post that reminded me of this. That is my only memory of that time. I don't want anymore.