Excellent post.
“Afterwards, many in the class complained that the film presented Communist propaganda.”
Where I was few enough of us were aware it was communist propaganda.
They did this stuff to us in high school also, in the 70’s. I didn’t know how leftist it was.
In my case I recall a teacher describing to us in a graph how a capitalist economy was a wave pattern of ups and downs but essentially flat across the graph. Then he overlaid on the same graph how a communist economy while starting out below the capitalist economy steadily rises in a straight line and eventually is above that of the capitalist one. I have forgotten everything else
about this teacher and the class he taught but I recall
that graph of his.