Given that the AGW hoax is all about the worship of the false goddess Gaia, perhaps heretic might be the better word. If you don't worship at her altar, then you are heretical, and will be punished for being so.
AGW - you believe the world is going to burn up and it is all your fault; you have a wildly exaggerated estimation of the consequences of your actions; you cling to this view in the teeth of reason, evidence and common sense. Everything you see or hear, however contradictory it may appear, can be interpreted so as to fit in with your Theory. You are frantically active, trying to fill in all the details of your Theory. People who try to dispute with you are wicked, devious plotters, in the pay of some secret global orgainsation of evildoers. You would like to silence them before disaster strikes. Paranoid schizophrenia, anyone?