Don't put much faith in John Cook?  How about zero faith.  I have zero faith in the data he uses.

Yes, the modern warming is the result of increased sunspot activity since the Maunder Minimum.  The sunspot activity and the temperature fluctuations correlate far more closely than CO2 does.  You never see a drop in temperature when the sunspot activity is increasing, but you do when the CO2 is increasing.

Not only do I not believe that CO2 is the cause of warming, I'm not convinced it's even been warming for the past 20 years, yet the trendline of CO2 increases remains intact.