Why do some believe that advocating the theory of global climate change means some are trying to indoctrinate?

The denialist want you to believe the earth warming from human activity is a political point of view not a scientific fact. They used political language because their denial and obstruction of action is politically motivated and NOT support by science or observed evidence (link to science and evidence provided in references). The actions needed to slow warming requires political agreements, but the science is science and non-partisan. The denialist want you to think otherwise and work to obscure the issue.