"Communism was a 20th-Century nightmare that left 100 million dead and a third of the planet mired in poverty and terror."
This is recognized almost everywhere execpt sociology departmets of most American universities, Hollywood, the new left, etc.
It is widely recognized, but not in a vivid way. While few believe in communism, most people don't regard it with the hatred it deserves, know where it came from or more than the sketchiest details of what it did, or know how to deal with it. And that's a problem.