Heh.. I didn't realize The Dead Zone was a movie. I read the book and have watched a couple episodes of the show with Anthony Michael Hall. Man.. I gotta find the movie. Walken is awesome.
Also, Hitler wasn't some half-demon spawn of Satan. He was just a guy. You're giving him more credit then he is due. He was no more evil than many other people before, and after him. He simply had a nation willing to listen to him.
Let get into the banal practicalities first. The prime law of safety is that if you are not 100% sure it is safe and you are capable deal with the situation keep you nose bloody well out of it. The real rescuers shouldn't have to risk their live to save any more than they have to.
Back on topic, IF is could save the child safely then I would. If I knew the child would grow up to be a monster, I'd get popcorn and watch, cheering all the way.
Wow, i know i said this question had so many different levels. But i didnt expect these levels to involve hypothetically bad parents, the uprising of the Nazi regime, or philosophical reasonings of how we are all capable of evil.