We demand action on Climate Change. Why are we NOT outraged at the proliferation of nuclear weapons?

Albert Einstein wrote: “Man has within him a lust for hatred and destruction. In normal circumstances this passion exists in a latent state; it emerges only in unusual circumstances; but it is comparatively easy to call into play and rise to the power of a collective psychosis”. How do we tame the human animal? When a world government was suggested the west thought it a communist idea and the east thought the west was wanting supremacy. Perhaps it was a good idea, but nobody wanted it. Is there hope for a federation of nations coming together for peace?