seem like movies of that era were all more or less propaganda
solemn, evil cunning enemies+sunny happy "good" guys+cartoonish fighting. I saw WWII movies made by Soviet Union, the US, several European and Asian countries during that era. They all look strikingly similar. Maybe audiences back in the 60s were more naive, more gullible. Nowadays, if you made a war movie with nothing but one dimensional characters, your box office figure would be ugly beyond recognition.
Hope for the best,plan for the worst,enjoy the rest