Here's the thing.
On the one hand, "alternative energy" has ALWAYS meant "alternative to nuclear", NOT "alternative to fossils" — as in Amory Lovins' "coal-based, fission-free bridge to a solar future".
On the other hand, I will happily tell people that I can envision a world in which half to two-thirds of the energy is supplied by solar, wind, et cetera — but only if the remainder comes from nuclear. Concentrated to balance diffuse at acceptable density.