Would you pull a Jesus and die for all of humanity?
I don't think humanity can be helped. The writing is pretty much on the wall for me. Humanity will not go extinct from climate change, and the beasts will pay a high price for man's selfish stupidity, but humanity will suffer a major correction, the survivors hopefully evolving enough morally to do better than Humanity 2023.
I also don't like most of humanity that I've encountered lately whether directly or via the news. I used to, but that's all changed, and caused me to redefine my humanism. It's not all of humanity that I admire or love or see hope or nobility in, just those with humanist values (reason over faith, tolerance over religious and other bigotries, equity over privilege, etc.). If your worldview is authoritarian or theocratic or accumulating wealth without limit, you only matter to me in a cautionary sense.
I find myself barely able to muster any empathy for the Palestinians. Sure, many are victims of circumstance, but they can consider this practice for the herd thinning, dislocation and privation that climate change will bring their children and their children's children. Those circumstances are terrible and will only be getting worse whatever happens there now. Who knows - maybe those surviving through the year in Gaza will come to understand the need to cooperate with their neighbors, or maybe their religions will continue to inform their hatreds unto their extinction. They both work for the rest of the world, and it's nature's way.
Climate change changes everything. I see only one outcome there, and it's not a good one for anybody living into the last half of this century or for a good while to come thereafter. Paradoxically, things look optimistic to me for those who live through the correction into next century, but not before then.
Also, I weep more for the beasts than humanity.