Andre,
I don't know if you mean it this way, but I find it insulting that you dismiss all counter-arguments as groupthink. Just because others come to different conclusions than you, doesn't mean that it was the result of some sort of false logic. If you want to debate science, then just debate it. Stop with the name calling.

As far as your graph, what is the source of this graph? And how exactly is "temperature anomaly" defined. And how exactly is sunspot cycle length defined? I assume it is something like the number of years between minimums or maximums - how do they define that number to a specific year? Is that year the midpoint or one end of the cycle?

I also notice that it ends at 1990. What does it look like if you extend it forward to 2008?

I don't think anyone contends that CO2 is the only forcer of climate. I could believe that for the period before 1990 that the strongest forcer was solar cycle changes. Certainly, natural factors would be the most important before humans got into the act. But, what about since then?

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