You're delusional if you think climate change isn't going to play out without human deaths on a massive scale, regardless of whether that's wars for habitable land and water or explicit murders of "surplus" populations.

We're on a path that is going to significantly lessen the carrying capacity of the planet (on the human timescales we care about). It's implicit and unavoidable barring a wholescale change in power structures and probably human attitudes in general.

It's not a good thing but it is inevitable at this point.