i firmly believe that people are not reading books. At least not the old books on important subjects. I rarely meet 'educated' people who read books.
I believe that the liberals in particular have lost their way intellectually post-World War II. There used to be Great Intellectuals and widespread public debates e.g. Isaiah Berlin. Today there is nothing. Maybe in place of that there is a smug contentment that we've the right answers, that probably is real.
In my internet travels I've seen that people will vehemently defend the UN Declaration of Human Rights. Yet they have not read it. It is a single page of text. It is easy to mythologize a text that you haven't read. I feel like modern Liberals are becoming like the folk who didn't know Latin but received audience from the priest.
If you can't read a single page but stick up for Human Rights, then you are an idiot in the most literal sense (the original meaning of the word 'idiot' from the Greeks). These people certainly won't have read J.S Mill's On Liberty, or the counter arguments.
tldr; Read more old books.