Nope.
If Afghanistan goes up in flames - there is exactly one nation that will suffer - that is Pakistan.
I know. This is why Pakistan is working hard to ensure that something like this does not happen.
You bank on US not only making sure that India does not trade using the Iranian port, you also bank on US curtailing Indian activities in Afghanistan.
Its not banking on the US but mere common sense. The US will not tolerate any activity that enriches Iran, it has successfully forced the Indians to back out of the IPI deal and forced the Indians to reduce their appetite for Iranian oil.
I believe you are mistaken on the former and the latter.
Not mistaken, already happening. Just open your eyes my friend
US does not care what happens to and in Afghanistan after 2014. US still wants Pakistan to be in the doghouse. India achieves that for US using Afghanistan.
Not really. American strategic planners have realized that it is in the interests of the US to ensure that both Afghanistan and Pakistan are stable. This is why the Americans have shoved down billions of dollars in both Afghanistan and Pakistan to try and stabilize the situation. They have realized that their strategy in Afghanistan was flawed by not including the Pushtuns, this is why the Americans are now openly embracing the Taliban and opening up peace talks with them. If they wanted Afghanistan to remain volatile, they would have never made overtures to the Taliban. It is in the political interests of the US that both Afghanistan and Pakistan remain stable and prosper, State Department was quite explicit in that.
As for the former - you greatly over estimate US's influence on India.
The only reason that India's lowered purchases of oil from Iran is because there is no god forsaken way to pay Iran. Iran already now buys goods from India as payment for the oil that India purchases - and there is a limit to what Iran can buy from India in kind.
So you admit, the US was successful in its goal. It has everything to do with influence, whether you like it or not but the US remains to be the sole superpower when it comes to diplomatic, political, economic and military clout. Through their chokehold on the Global Financial System, they were successful in reducing China's and India's oil appetite for Iranian oil.
The only way for US to stall India's plan in Iran is for US to offer something that India cannot refuse - like US offered nuclear deal, and the price was to let IPI go along with purchases from US(civil/military/nuclear).
Indeed, they offered something to the Indians they simply could not refuse. In case of Chahbar, they don't have to offer anything because the Americans are the top dogs in Afghanistan and India is at best a 'Non Entity'. India lacks the political, diplomatic and military clout required to be a major player in Afghanistan. Its a sad reality but unfortunately it is the reality.