The fact that the planet has warmed and cooled in the past does not prove that humans are not responsible for warming this particular time.
I can see your point, but considering the communist background of the people behind the "global warming" movement, one should not overlook the alterior motives of those who preach "global warming" as a manmade phenomenon.
Look! They even chose Vladimir Ilych Lenin's birthday for their "Earth Day" celebration. The enviromentalists abviously have a hidden agenda behind their movement.
I agree that there may be hidden agendas going on here.
In an earlier post, I said that the Warmers had the burden of proof to show that warming is going on. Because of the possibility of great damage, I'm starting to think that the Status Quos may want to demonstrate warming is not going on.
If warming is occurring, I don't think it's relevant whether it's caused by humans (other than to confirm it's happening and/or to help design a solution).