Peace, I think you are correct about the risk of nuclear weapons being used soon in the Middle East, and the risk of WWIII. I think this is the most dangerous and unstable situation we've seen in the world in a very long time.

The use of a given weapon is only considered to be "unthinkable" until it's been done (or in the case of atomic weapons...done again, since the USA already used then in 1945). Then all bets are off.

I think it would considerably take more than a single nuclear weapon to kill 10 million, by the way, but I suppose it would depend on which kind of warhead and exactly where it went off. One in the middle of a very densely populated city like Mexico City or Tokyo, for instance, might well kill 10 million if it was a big enough one. I'm not so sure about New York or L.A. when it comes to that.