Young morons.
I recall vividly those winters we had in the 70's -- much worse than this year if you can believe that -- when all the media were talking about the new Ice Age comming because of air pollution, and the young morons were sucking it up hook, line and sinker.
No different than 500 years eariler when every crop failure or plague or harsh weather was blamed on Witches. So they burned the Witches.
There are always new generations young morons comming along and the hustlers, just like 500 years ago, will always find 'Witches' to blame thing on.
CO2 is just the modern day Witch.