Well clyde is right but for the wrong reasons, there is a better justification for his mocking of others beliefs.
So heres my better way of justifying it using my favorite tool, philosophy. The basic idea that clyde seems to be getting at is the Marketplace of Ideas theory, this states (For those who never took philosophy) that everyone should say what they want the good ideas will rise to the top and become accepted while the bad ideas dissapear at the bottom. This is the foundation of democracy. So Clyde's mocking of others beliefs is totally justified, because if his ideas are rejected by the rest of society they wont be addapted by society and will die out. Think of it as belief based darwinism.