I would rather a hundred, a thousand, a million people die in conventional warfare repressed by brutal dictatorships than a single nuclear weapon get detonated in anger. When that starts, the death of billions is not far behind. Nuclear weapons are the first of the real short term man-made existential threats, and as long as anyone has them we have to try anything and everything to make sure they don't proliferate.

I would advocate for the existing ones being destroyed as well, but I think that cat is not going back in the bag. It does make one consider the other short term (and longer term) man-made existential threats and why we aren't frantically trying to keep those cats from emerging from their respective bags.