Marxists and liberals alike do what's necessary to repress conflicting opinions

"Why has Sweden become the North Korea of Europe?" That's what a Dane semi-facetiously asked Swedish cartoonist Lars Vilks at a conference I attended in 2014. Mr. Vilks unconvincingly muttered about Swedes' partiality for consensus.

Now, along comes Ryszard Legutko, a Polish professor of philosophy and leading politician, with a ...