As Zippy has observed, Hillary Clinton is sufficiently crazy to provoke Russia into war.
As Secretary of State, she continually prodded Russia by threatening to attack their Syrian allies for what amounts to no reason, and by encouraging a pro-western coup in the Ukraine. Moreover during the last debate, she proposed to institute a no-fly zone in Syria, and when the moderator asked her if she would shoot down a Russian plane for violating it, she blatantly ducked the question.
Meanwhile, Russian nuclear bombers have repeatedly violated American and European airspace, serving the purpose of demonstrating what a weak spineless fool Obama is.
I doubt very much that Putin respects Hillary anymore than he does Obama. The problem is that unlike Obama, Hillary is a crazy person who will annihilate half of the world without a second thought. Combined these factors could lead to the use of nuclear weapons, and the consequent destruction of most of the world’s civilizations.
And whether or not this happens will come down to a popularity contest and whether people believe some bimbos who claim to have had romantic encounters with Trump.