The Overton Window is known to many but still most can’t see how it shapes acceptable politics. What’s left and right in the US is shifted so far right from most other democratic countries.
I don’t think the US is the outlier that people think it is. Other “democratic” nations are undergoing the same political issues at the behest of the same economic interests.
With the major difference that those nations have a lot more social programs to combat poverty and homelessness, and have health insurance that doesn’t bankrupt people. That really helps with social cohesion and prevents larger scale radicalization.