I'm willing to entertain the notion that the climate is changing. Our direct observations of climate conditions represent a very small sample size in geological time, after all, and because a planet's climate is a dynamic system, it would be highly unexpected for it to remain unchanging over any significant period. Why would we expect stability after all?
Where the movement loses me is when they blame humans for climate change. It reminds me of the ancient pagans practicing their Yule rituals to convince the sun to return.