Climate deniers think they know it all.  They willfully choose ignorance over the quest for knowledge. 

"All truth is one.
In this light, may science and religion endeavor together for the steady evolution of Mankind:
From darkness to light,
From narrowness to broadmindedness,
From prejudice to tolerance,
It is the voice of life that calls us
To come and learn."

~Cuthbert W. Pound former Chief Judge of the New York State Court of Appeals