So you agree that rapid climate change is a potentially devastating event, whatever the cause.
Most moderate to major changes in environment are disruptive to the organisms affected. Most are local, like an oil spill will kill a lot of birds and marine life, or an unusually cold winter will reduce the mosquito and flea population (at least around here).
During much of the Roman Empire, world temperatures were fairly warm and Northern Europe and Siberia were more livable. With warm weather, they were able to grow enough food to support themselves.
As the weather cooled about the same time the Roman Empire began to rot at the core a number of things happened. It caused some people to start migrating. Scandinavia had more people than the land could support so they started coming south and fighting their way into the Roman Empire. Siberia also became a difficult place to live and tribes set out for someplace more hospitable. That also caused waves of "illegal immigration" into the Roman Empire. These tribes were known as the Vandals, Goths, Visigoths, etc. A couple made it all the way to Rome, though most settled in Eastern Europe. The Slavic people today are a mix of these nomadic tribes and the natives who were there before them.
Human civilization has become more sophisticated, but in some ways it has become more vulnerable too. When most people lived in hovels with few possessions, it was a problem, but easily solved to pick up stakes and move to a different house if living where you were becomes untenable. Today we have over 1.5 million people living in Manhattan alone. It's a small island essentially at sea level and it's the financial hub of the continent. If Manhattan becomes unlivable, for any reason, relocating those people and all the systems that tie in there would be a major task. Far more effort than 100 villagers having to build new hovels.
People go on about how climate change could kill the planet. The odds of that are lower than the odds of winning Power Ball. Twice in a row. The degree of change we are talking about from human introduced CO2 could put human civilization at risk and a collapse of civilization could kill a significant number of humans. It could also mean a pretty good hit, short term, for some animal species, but the Geologic record shows many, many climate changes far greater than what we're talking about and most species survive just fine. Their numbers might take a hit for a short period, but they come back when the change normalizes.
The last 2 million years have been among the coldest in Earth's history. There was a period about 650 million years ago when there was an ice age so severe the ice caps reached the equator, but for most of Earth's history, temps have been much higher. About 1/2 of the last 600 million years world temps have been about 10C warmer than today.
Human civilization and possibly the human species might not survive a major warming, but the world will.
The current time is not the warmest it's been in the last couple million years either
This is a chart of the ice core data over the last 450,000 years. You can see relatively short spikes of warm with longer spans of cold. The present is on the far right (the Holocene). The last warm period was warmer than the current warm period (the Eemian).. Evidence has been found in the middle of the Everglades of a coral reef that had been off the coast of Florida during that period. It's now in the middle of Florida because the peninsula was that thin due to high seas then.
Any major change over a relatively short time would be disruptive and possibly calamitous. Changing climate wasn't the only reason the Roman Empire fell apart, but it probably contributed. Too big a change too quickly would be very rough on human civilization, but about the only thing humans could do that would really harm Earth beyond a relatively short hiccup would be a full blown nuclear war.
Earth is going to have a tougher time dealing with plastic, and human depletion of the oceans. There are feedback loops in the world's climate that deal with changes in CO2 and both warming and cooling, but Earth has never had to deal with plastic before. I'm surprised no bacteria has evolved to eat the stuff. It's a banquet waiting to happen to the right organism. But for some reason that hasn't happened.
Most humans tend to think in years and decades because that's the limit of a human lifespan, but we're just a fly speck in the whole arc of world history. What we're doing to the planet is more than humans, or any one species has ever done, but human capabilities pale in the face of what the planet and the cosmos can deliver.
On the immoral front when Tesla is private, everyone will bicker about whose tax money they want to steal and don't want to pay, as usual. I'm in the camp there should be no more incentive, since both solar and EV's have taken hold and become economical, but I want that across the board: no incentive to pollute (so, charge them for pollution); no incentive for anything. But it doesn't work that way: we have strategic needs to transition from the old style to the new style, and right now, we're stopping terrorism by pumping out as much oil and coal as we can. The faster we can get the old oil companies on board with transitioning to solar, the better, which is exactly what KSA is trying to do.
For Tesla the $7500 incentive worked perfectly. They hit the 200K mark right as their first mass produced, affordable long range EV hit production stride. For the rest of the industry, not so much, but that's on them. They could have done it, they just didn't.