It's easy to understand really. People who won't acknowledge it don't understand it, and the mouthpiece for science, in their eyes, has political motivations. If they were to get involved at the research level they'd have a better understanding of the scientific process, and maybe develop a trust. As it stands, the word "science" just means "our opinions based on stuff some other people said" to most of these guys who spent their lives profiting from resources, not protecting them.
When it comes down to it, it's almost impossible to trust that even a hard core scientist wouldn't turn shill if the money was right.