The only way to "cull all politicians and dirty industry leaders" is realize that wind and solar can't provide base power at rates people can afford. And if people have to spend too much on electricity, they'll vote in new "politicians and dirty industry leaders", like Germany's (and soon France's) return to coal burning.

If we started today with nuclear, we could trivially hit the 1.5C IPCC goal. Hell, we could likely hit it if the world started fracking and moved to wind/natgas plants (like the US is doing rapidly). But at least for now, nuclear and fracking are less preferable than >2C warming to nearly all climate change advocates.