They do believe the numbers.
They accept them as necessary.
They just won’t admit it for obvious reason.
(Some do admit, in unguarded moments.)
California Gov. Jerry Brown to protesters during climate speech: ‘Let’s put you in the ground’
http://www.washingtonexaminer.com/california-gov-jerry-brown-to-protesters-during-climate-speech-lets-put-you-in-the-ground/article/2640410