I know. that man could have so easily shot him and have been done with it. sure, you shot someone and they're dead, but if that man knew what was coming he could have saved millions of lives. it would have been one pull of a trigger and then you would have killed one of the most infamous people in history without even knowing it would impact the entire world for decades to come. As you said, its one small decision. anyway's hitler had no one left, so no one to mourn his death.
