California's fires are caused by Republican CO2
There's a difference between a true environmentalist and a Pristine Earth believer. One understands environments should be maintained and engineered to balance human interests with conserving habitats for other creatures, and the other views humanity as an anathema to Gaia, and human habitat as sin against a righteous planet.
The troubling thought to me is that if there existed a technology that could destroy all of humanity, there would be thousands if not millions of people that would push that button.
That technology will likely be accessible to individuals at some point, especially considering the ease at which genetic engineering tools are likely to be developed.