"If you do not believe in climate change, you do not believe in facts, or in science or empirical truths and therefore, in my humble opinion, should not be allowed to hold public office."
His entire quote is 100% factual
The science of climate change is very well established and accepted by virtually the entire scientific community. If you don't accept it, you don't accept scientific facts. If you don't accept scientific facts, you can't make good or accurate judgments based on them. And if you can't do that, you should not be allowed to be in a position that has real world affects on millions, if not billions, of peoples lives.