Not sure why you feel that the fact that CO2 naturally fluctuates shows that we were due for CO2 increases. Your link suggests that in recent history it fluctua

Not sure why you feel that the fact that CO2 naturally fluctuates shows that we were due for CO2 increases. Your link suggests that in recent history it fluctuates between 200 and 300 ppm, we now see it at 400 ppm and know of many significant and new CO2 emitting sources. You also mention that humans have survived many drastic events, not sure what purpose bringing that up is, the problem is that we are facing a potentially huge humanitarian and economic crisis which we can potentially avoid. The knowledge that previous events didn't destroy the species does little to alleviate that fear.