We’ve had to constantly explain this to climate deniers for decades. It doesn’t matter though.
It's why we for the most part stopped calling it global warming and starting calling it climate change. So idiots wouldn't walk into the US house of representatives holding a snowball to disprove "global warming" ....
The polar jet stream becomes unstable during climate change, and whips around more dramatically than it ever used to, sending polar arctic air far south.
Exactly , also when we look at the probability density curve for observed temperatures and how they are predicted to change in the future, we see a shift towards warmer temperatures in average, which would mean more hot and less cold conditions. But at the same time the variance increases which is flattening the curve. The result is much more (extreme) hot weather and no (or much less) change in cold temperatures.
Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.
As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades:
How much each change to the atmosphere has warmed the world:
Recommended actions to cut greenhouse gas emissions in the near future:
Anti-science, inactivism, and unsupported conspiracy theories are not ok here.