From Wikipedia: Pascal's wager.
We can apply Pascal's wager to the social split in terms of the two main opinions on manmade climate change.
Many who believe in manmade climate change, are not scientists and therefore may not be able to reason all the hard data and draw the same science conclusions as the consensus. However, based on the prestige of these science leaders and all the doom and gloom predicted for doing nothing, many still think it is better to be take part in this religion and help avoid the potential of hell on earth. This path will lead you to the promised land.
The other choice, is to ignore manmade climate change and go on with your life. There is a good chance you will in the same place if the doom and gloom is all exaggerated or put off further and further. However for others, the cost of not believing and not being better prepared, to avoid the doom and gloom, is too high, so they choose to believe. This seems rational enough.
There is a strange religious parallel; Pascal's wager and religious instinct. A global flood like Noah, is also a part of the doom and gloom mythology of the manmade climate change theology. Original sin, such as white guilt, is also part of it.
I personally, see myself as a development type person, who can adjust to changes, if needed, so why worry all the time? I mostly need good data from others angles and sources, so I can better adapt with less paralyzing fear.
In the case, of the Christian faith example, even a last minute change of heart, if sincere, can be enough to enter heaven. I assume those who choose to stayed paralyzed in fear of climate change, if able to learn where to go, to survive, will tell others, if possible, if those others repent; A Place in one of the Human or Animal Arks of the Great Climate Change Flood of 2100.