I have a dilemma for you (inspired by Lost)...if you could go back in time and kill Hitler as a young child, would you? Knowing that you could save all those innocent people just by killing one innocent boy?
Maybe I see things too much in black and white but I think I'd do it. Sure he's innocent at the time, but you know that he'll go on to commit so many horrible deeds...I don't really think there would be a chance to 'reform' him...
What are your thoughts ?