Picking it from your first point...
This world, ready to be saved?
As it is now, even if Jesus come to the earth to die again, people would boldly tell him to hide because his death is not going to poke their lifestyle to change. That's how the world is and sacrificing oneself for others to live is more like a waste of time and life.
I can't sacrifice my life for others, but I can kill to save😅