According to this video, a signature of CO2 warming is the surface & lower atmosphere warms while the upper atmosphere cools.
https://youtu.be/H5kejSYPD7U?t=90
Yet the current heavy snow storm in Europe is being caused by the splitting of the polar vortex, caused by warming in the stratosphere.
https://weather.com/forecast/national/news/2019-01-10-the-po...
There's speculation that the acceleration of movement of the magnetic poles may have a factor, but it's a complex system...
https://weather.com/forecast/national/news/2018-12-18-polar-...
Point is, there are many complex dynamics at play & it's tempting to many people to subscribe a single factor as the primary cause. The reality is far more complex than what many of us would prefer, so many of us view reality with a simpler lens that we wish to see things with...