Many if not most of those who are liberal enough to "believe" in global warming also believe in countless other forms of dumb shit that's even more stupid than the Earth being 6,000 years old. Otherwise they would reject religion outright, or in the other case accept it as ansolute. Whatever someone believes is only loosely related to their other beliefs, science or not. Observe what people do in practice, not just listen to what they say, and you'll find lots of fake Conservatives and Orthodox Progressives.
