Ignoring the fact that a man who believed he talked to God was president of America for 8 years doesn't exactly do much to to make me believe you. Especially given that Reagan's Evil Empire speech actually did come quite close to causing a nuclear war. Put those two together and you should be able to see that a single crazy in the right place could cause the massive devastation you seem to consider unlikely.
Cite sources. Credible sources. And that will be a believable argument.
However as it stands the entire system is set up to prevent exactly that. You can't simply give the order; it has to be validated, approved, etc. The two man rule, and so forth. There are very few nuclear powers who don't go to extreme lengths to prevent this exact scenario from ever coming about. I suppose if you were in Pakistan or something you could try to trigger the end of the world, but that'd be somewhat difficult because people retaliating against Pakistan isn't going to provoke everyone else.
I could go to absurd lengths describing the problems someone would have had starting a nuclear war on their own and my information on the subject dates back to 1970. The failsafes have only gotten more elaborate. (And both Russia and China maintain more complex systems than the US for political reasons.)
In fact I'm reasonably sure of all the Western powers only the Brits have a methodology in place that would permit the use of nuclear weapons on one person's word, and even then it's dependent on there being no one left to give orders to the strike assets, which would be difficult to engineer.
I'm referring to the number who get into heaven. Ever. Including those already dead. Not the number raptured in.
Yes but you're quoting the psychedelic madness of Revelation out of context, which is the first step on the road to insanity.

Nevermind the number; the
sealed could mean damn near anything.