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‘Climate change is here’: Experts warn global crisis is decades ahead of forecasts
(www.independent.co.uk)
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.
Humans will survive, civilization won't. And since we already dug up and burnt all fossil fuels that are reachable with primitive methods, it might not be possible to jump-start development beyond medieval tech ever again.
You're right; the white supremacist concept of "civilization" would not survive, with its destructive concepts of "primitives" and "medieval tech level".
That said, people will still have access to scientific knowledge, procedural knowledge, engineering knowledge, cultural knowledge, regional knowledge, etc. Their ways of living may not clock as "civilized" to the sort of people that built Phoenix, Arizona - a monument to white supremacists' arrogance - but they could live long and happy lives using technology to live within their means.
That said, if Antarctica melts it would have tons of quite easily accessible fossil fuels. So if "civilization" wants to have another go at destroying the world, it could.
TIL China is white supremacist.