There is no doubt that Germany would have had a far better chance of success had Hitler wanted to help the people instead of enslaving or exterminating them; however, had he done so he would not have been Hitler. The Nazis were not liberators. Had they been so there would have nver been a war. By 1943, there was nothing that Germany could have done which would have saved her. She had sealed her fate in Soviet Russia alone( I won't even mention this little thing called the Holocaust). Once Hitler was named Chancellor, Germany was finished.