>>most of those Soviet favoring films were essentially war porpaganda that was sanctioned by the goverment.<<
Yup. Once Uncle Joe turned on the Nazis, the enemy of our enemy became our friend. And since the liberal elites in both Hollywood and the government had always been sympathetic to the Soviets anyway, they regared this as a natural evolution toward a better world.
Remember that during the Depression, many Americans came to believe the capitalist system had failed and that socialism/communism was the solution. After WWII, when the Soviets began to take over eastern Europe, and the truth about purges, mass starvation, etc., began to come out, most Americans turned away from the Soviets. Liberals, however, never did. They promote socialism to this day.