As a person who believes man is effecting the climate, and is very worried about sustainability, but also thinks that there are some climate scientists who are off in their estimates (or can be too myopic at times like any other human) and that there is still much for us to learn and discover, yes I can confirm that if you question anything or approach things with skepticism (even though that's the way science is supposed to be done), you are a "climate denier" or often called "a science denier." It's quite depressing.

I had hoped by now humanity would be moving deeply into rationality, but we're still just as emotion-driven as ever. We come by it honestly since our neurology is tuned to handle most (or maybe all) decisions subconciously and then have our conscious/rational mind justify the decision after the fact, but I do believe that by understanding our biology and implementing systems/approaches to combat it, we could become a highly logical species. There is still some hope on the horizon. Live long and prosper my friend.