You won't get anywhere by pinning the blame on the medium. Freedom of association allows birds of a feather to flock together and make sport of the other side.

You won't get anywhere by pinning the blame on the medium. Freedom of association allows birds of a feather to flock together and make sport of the other side. People seek social groups that make them feel good and avoid ones that make them feel insecure. They especially avoid places where they are made to feel stupid. So they tend to prefer places where their beliefs are confirmed and maybe they can get away with calling someone else stupid. What you are fighting is as natural as water flowing downhill: animals seeking comfort. You have to overwhelm gravity itself to turn the flow uphill. There is no lack of good discussion venues. There are only too few people who prefer them. How can any such venue attract the masses out of their comfortable, partisan clubhouses?