Some people wanted a multi-polar world, well, this is what a multi-polar world looks like: the poles start competing, including arms races. "History may not repeat itself but it often rhymes." as they say.
The only thing that matters is that all people rise up and demand an end to nuclear weapons.
If Pakistan and India both didn't have nuclear weapons you can rest assured they would've long fought an endless stream of wars with tens and tens of millions. They hate each other.
Specifically, the people who are not part of the American mono-pole.