Life will survive. Life will adapt. Life will thrive in the new environmental conditions. That's not in question.

Humanity in our current form evolved to live within the web of life. That web of life evolved to thrive at concentrations below 320 ppm, in patterns that go back a million years. There have been periods when it was higher, like the Eocene (56-34 million years ago), when levels often exceeded 1,000 ppm. But homo sapiens haven't experienced that. None of the life forms currently existing on land are adapted to that.

I agree that it's somewhat silly to blame a three atom molecule for global climate change. That's a shortcut and an insult to the science. It's like something that snake oil salesmen would come up with to sell their wares.

The threat is not the CO2. It's how the Earth will change and how life will adapt to that change. Follow the science, replace the money.