https://www.youtube.com/shorts/Xlb6zoqkeG0
Above is a youtube “short” of Nixon answering a question on if professors should teach about marxism or communism.
He replies to the effect “Of course they should teach about it so the students learn about it. Where you need to draw the line though is when that professor is advocating for a foreign government over the United State’s position. Especially if they are in a military conflict with us.”
Or as Reagan said, “A Communist reads Marx and Lenin. An Anti-Communist understands Marx and Lenin.”