Perhaps the war wouldn't have happened Teribus, but I don't know that you could say the same about the Holocaust.

As history has shown over and over again, the Western powers are very selected about what acts of genocide they choose to intervene in, and it is pretty apparent from all the historic evidence, that none of the Allied powers were likely to have intervened in the genocide within Germany's borders.

I agree the Allied powers didn't do enough to contain Hitler when they could have. But Hitler was pretty determined to go to war, and there isn't much you can do to stop an aggressor, despite the current fantasies being spun about "pre-emptive" abilities today. The Allies just didn't have their war machine tooled up and ready for the long haul the way Hitler did his--which made a difference too.