If the president gave the order, within a week from today 8 b-2 bombers, a dozen f-22's, and 200-300 cruise missiles could be on their way to just about any target in the world. No nation in the world has any credible defense against those weapons, the US included. Combined those weapons have enough destructive capacity to take out the majority of the fighting capacity of the PAF. That is just the first wave, the US could simply use its conventional fighters/bombers to screen against offensive action by the PAF, and in the BVR world, Pakistan does not stand a chance. The US could place 3 aircraft carriers in the Indian ocean within the same time frame, who combined could probably equal the capability of the PAF. If the US military gets to choose the time and place of a battle, it will win it. If of course, the US is dragged into a conflict before it is prepared, well, that is a different story is it not?
If those figures don't convince you, then nothing will, so I rest my case.
Also, this is just silly "armchair warrior" stuff at this point, so I will shut up now.