> It's statements like this, which are completely absurd, which are hindering our progress of making meaningful change.

Only the degree of certainty of the statement is exaggerated. The content is well within any reasonable scenario-planning approach. Near-term catastrophe may not be the most likely outcome, but on all accounts it is likely enough to be the most genuinely alarming threat we've yet faced. You may not like the tone, but surely you can muster the courage to set aside your personal taste with regard to something so important?