People who care about global warming should start an immediate campaign to end hyper-partisanship in national politics and encourage civil debate. A culture has been fostered that encourages the demonizing of one's political opponents. If an "evil" person makes a valid point, many are still loathe to recognize it as such for fear of granting credibility to an enemy.
If you believe that global warming is a man-made disaster that will destroy our planet and way of life, you have an obligation to cease and desist from hyper-partisanship. The old saying is true that you attract a lot more flies with honey than vinegar.
Tim Thorstenson recently commented about the problem with accepting or rejecting alleged facts about climate because they are moral or immoral. Facts, he argues, have no moral component. We use our moral lens to help us interpret and act on facts, not to determine the verity of a factual assertion.
If global warming is a problem that we have power to address (which I doubt), then we should makes laws to address the problem. If the good of arresting global warming outweighs the bad caused to people in the developing world (which I doubt), then we should act.
If you treat me as the spawn of Satan for contesting your assertions, you lose the ability to persuade me. And if you think global warming is a looming Armageddon, it is in your best interest to persuade me rather than demean me.