Edited: Since I'm being downvoted. Political Correctness wasn't really a thing until around the 80's, the same time period as the cold war. It really is acommunist term. The term "political correctness" first appeared in Marxist–Leninist vocabulary following the Russian Revolution of 1917.
Yuri is saying the KGB was enacting total war decades ago, and that it takes several generations to see the change. When you can see over the course of 30 years, how political correct seeped into the american consciousness, yet somehow skipped over many other parts of the world. I think it's worth looking into, and thinking critically.