"Pruitt, who is Oklahoma's attorney general, is a climate-change denier". 

Already in the 2nd sentence, the generalized labeling & marginalization starts, as noted below:

“Once you label me you negate me.” _ Søren Kierkegaard.

For 4M+ years, the earth's climate has been changing, with far greater changes then seen by man. 10,000 years ago, North America was climbing out of a sheet of ice 1000's of feet thick in places, and oceans were starting to rise again. 

So what did Pruitt say that made him deny the earth's climate never changed? 

Just because he belongs to an Evangelical church, does that make him "climate-change denier"? Or is he skeptical of the idea, that humans are responsible for most of the climate change, in the last 100 or so years?

And if he is, he is in good company. Most of the scientists polled from the American Geophysical Society, didn't feel it was worthwhile to even answer a survey, if humans were the "significant" cause of "climate change".