<yawwwwn> Ho hum. Another meaningless article. The US will do nothing because the US itself is powerless. it has given the kotwal's job to the chor and is itself unable to be kotwal.
Of course that does not make India any more able to do the job. But I see a difference in the way we refer to the US and India. Indians are mocked as being unable to do anything about Pakistan. But the idea that the US also can do nothing about Pakistan is resisted by the idea that the US would be able to do magic if they only realised what Pakistan is doing.
In other words the commonly displayed attitude towards India is:
"India knows who is guilty but is weak and cowardly"
The attitude towards the US is:
"The US is powerful and brave and can take care of any problem. Only the Pakis have them fooled. If the US found out they would crush Pakistan"
This is of course nonsense, but it gives us a straw of hope hat we can cling on to for a few more years. The same "High hopes" attitude is shown towards Paki nukes. On this forum, I have sen, over the years - the opinion that Israel might have dealt with Paki nukes, then the view that the US "has contingency plans" for Paki nukes and more recently "China will reclaim its nukes from Pakistan". These thoughts are merely ways of comforting ourselves and believing that there is a god, or a godfather who will protect us from evil.
Nothing could be further from the truth. We are displaying cognitive dissonance by refusing to accept the obvious. The US, Israel, China etc are totally powerless in handling or checking Pakistan. Incompetent or not, cowardly or not, we have to do it ourselves. If we take a few nukes along the way - let us prepare for it. But we must not depend on the US, Israel or China to contribute even one photon's worth of positivity to the issue.
You're right that the U.S. has limited options in handling Pakistan, and that is something the Americans are very candid about.
At the same time, the Americans did trust the Pakistanis thanks to bouts of cooperation during almost four decades over the span of the Cold War, and in to its immediate aftermath. Although US and Pakistani interests were often divergent during these times, they weren't in deadly conflict.
America is used to lazy and corrupt allied governments, they're used to anti-American factions within allied governments where power may see-saw, and they're even used to governments or factions whose attitude to the US may fluctuate between hostility and cooperation. What it is *not* used to is enthusiastic allies who also enthusiastically try to kill you at the same time - in fact its been a real challenge for them to wrap their heads around it, and they are still struggling to deal with it.
It has taken many years for distrust of Pakistan to spread through the American system, but it has become more and more pervasive through the intelligence community, the military, and the political class during the Pakistani supported Taliban resurgence of the last five to six years. The problem that remains is the nuclear factor, which no government, whether American or Indian can take for granted.