John Kerry had to have science tell him that gravity existed. He could not just see objects fall after he let go of them ? That explains a lot. Science does tell us that the Earth in recent times has been going through cyclic periods of cold weather called ice ages or glacial periods. Science also tells us we are over due for the inter glacial period to end and the glacial period to return. That means that any AGW should be welcomed with open arms.
Warmer = Good in climate history. In fact, try living during the little ice age, if you think that now is really bad.