In 1934, Tru Vue published "New York's Chinatown", which starts with a little racist poetry and goes on to show some random street scenes, etc, as well as making it look dangerous and exotic. The 3D is well executed for early Tru Vue - the racism, not so much. Also included, a short explanation on how a Tru Vue filmstrip was put together.
In 1935, neither the phrase nor the concept of "politically correct" was in existence. Nowhere is this more evident than in this set of 14 stereoviews from the Ringling Bros. and Barnum & Bailey Circus - in this case, the Greatest Freak Show on Tru Vue 3D.