Why does the left fear their ideas being challenged so much? If you are right, a debate will only help you. When I am confident about a position, I want people who oppose it to be able to debate me. I want them to see the entire context of my arguments, I want them to do their own research and if I am wrong, I want them to change my mind. The left is a cult and it is getting really old that we keep coddling them like children and handing the country over to them.