First, pointing a finger and screeching 'DENIER' seems a lot like pointing the finger and screeching 'HERETIC', lending credence to the whole environmentalism-as-a-substitute-religion theory.
Beyond that, these scientists might find more traction for their beliefs if they could get away from the folks who are peddling 'solutions' for AGW. You know, the activists who want to make energy so expensive that poor people will have to live in dark, cold homes, and gasoline so expensive that they have to stay in those cold, dark homes.
I imagine, however, that any activist or scientist advocating the use of 'denier/(heritic)' has substituted Gaia for God, and would be very happy to burn their opponents at the stake.
As for me, I'm not qualified to analyze the science. Instead, I'll consider the matter when the people who say it's a problem act like it's a problem. Until their personal conduct matches their words- buying carbon credits ('indulgences') doesn't count- then it's just a continuation of prior climate panics.