To be clear, authoritarianism is rampant on both sides of the aisle. The gross resistance to even basic right wing ideology is proof of that (which to be clear I'm not calling Trump basic right wing). Hell the fact you're calling for violence is more proof.
Left and right, people want to force others to believe what they believe period. If you don't agree you get attacked.
We need to stop "fighting" each other, and start listening to each other. Then, instead of fighting amongst ourselves, we can unite against the common threat. Oligarchy, and plutocracy.
The science doesn't matter anyway, if it did, and this wasn't just about money and politics, countries like Canada wouldn't be charging a carbon tax, driving up prices for Canadians making them more poor which science says makes them worse polluters. Instead we would be shipping natural gas to India and China to phase out their coal consumption. We'd be using pipelines to cut carbons emissions from transportation vehicles. We would be using tax dollars to install solar on people's homes for them, reducing infrastructure maintenance and upgrade requirements for line and roads.
It's not about the science. It never was. That's why we are all doomed.