Terrifies some people, doesn't it?
Some people are frightened of college kids learning about communism or Islam in school, too. Those are the people who believe that the world is against them, that the media is biased, and force is the preferred means of solving problems.
And they are absolutely incensed that there might be some other ways of thinking other than their own in the world. And feel they have to attack.
Must be very uncomfortable. I'm sure glad no one around here is that uptight!
Arf