Imagine getting this mad about quotes, or people having opinions about politics.

This is what happens when you're in the habit of talking in an extremely structured/restrictive way for too long. Can't accept anything different. But it can be good to have an open mind and really listen to different perspectives.

When Galileo was right about the earth revolving around the sun, instead of the other way around (which was accepted as true at the time), he was attacked for thinking differently, even though he was right. People wanted their comforting lies instead of thinking critically to find the truth. Nobody likes their worldview to be challenged.