Well its easy to get a consensus when your job depends on it.
1000 years ago you'd lose your job and/or be burned at the stake for claiming the world was not the centre of the universe, or revolved around the sun.. or wasn't flat. When a a political and philosophical orthodoxy descends on the institutional science of the day.. one dissents at his peril.
Even when the theory has collapsed into pure nonsense... even when all the predictions have been proven wrong and the scientific method has been abandoned as it has with AGW.. the rigid orthodoxy.. increasingly embattled, isolated and lashing out will remain, driven on by blind allegiance.
But basically everyone else in the World knows the AGW Emporer is not wearing any clothes..Many honest scientists have said so.. but you will face the WRATH of the AGW CULT.. and they are true fanatics.