Ummmmmmmmm, for starters killing millions of civilians? Then filling the atmosphere with the soot of nuclear war resulting in global famines? Consider also that 1 singular missile reaching NYC kills 1.5 million Americans in the 1st 24h, and injures 3 million more. You can't 'win' a two sided nuclear war lmao. Only someone completely microwave-brained by ideology and with a deep hatred for human life would consider an offensive first strike.