Well this is the Internet so no surprise people with zero education in any of the pertinent earth sciences have such strong opinions.
I don't know shit about climate change and its' causes BUT I do have a lot of respect for science and those who dedicate their lives to it. The VAST majority of the world's foremost scientists are of the opinion based on scientific data that global warming is real and it's largely a man made phenomena. Scientists have big egos, they love to try to prove the other nerds wrong. That there is almost unanimity on the issue amongst them leads me to believe they are right. And no I don't believe the 'lefties' have or even could buy off that many institutions and scientists.
Just because the planet has gone through climate change before naturally doesn't make man made global warming 'ok', that's like telling your kids to hit the tanning salon every day risking getting cancer at 40 because cancer is a natural disease process that will get you at 80 anyway.
I think nuclear war and solar flares and/or EMP taking down the power grid are bigger worries than climate change in ours, our children and grandchildrens' lifetimes.