Why do anthropogenic global warming skeptics so often present amateurish arguments?

You pretend that the left is informed. They invariably blame GW on ozone, pollution, GW Bush, and believe the climate is static and perfect. Warmer is better? You are so confused in your thinking that you have convinced yourself that warmer is necessarily worse. If you could acknowledge that there is some good in warming, it might go a long way toward curing your obvious paranoia.