I don't see it. The 1930s weren't that long ago, there are still people alive who lived through them. If you were talking about ancient Egypt, you might have a point.
The 1930s had radically different opinions on race, gender, religion, and a host of other things as compared to today.
The 1930s had radically different opinions on race, gender, religion, and a host of other things as compared to today.