Yes, put like that, it is weird. Presumably you need to flatten loads of Moscows in any one country! Perhaps someone can enlighten us?
Indeed. Why would you need to do that. If we are merely seeking a deterrent, then surely in the mind of Putin, having 'just' his capital city, his government, millions of people, including many of his freinds and family, and hundreds of years of history, is ENOUGH, no?