Mutual assured destruction or MAD is a good deterrent and that is the reason why the nukes in Russia pauses no threat to America as long as they do not pass to any of those several terrorist groups willing to use one or two against the West.
I think that the reason why America supports the Pakistani Military and this institution hides its nukes from America is that while at the eyes of America the only stable institution in Pakistan is the Military and therefore America has no option other than supporting it, at the eyes of the Pakistani Military America would not hesitate in destroying the Pakistani nuclear arsenal at the minimal sign of instability on the part of that same institution.
This just shows the dilemma that America is facing and where the danger lies.
