Nice fairytale. As long as it keeps you happy, carry on. Facts and reality are quite different because people did care about East Pakistan. Perhaps not all but most did.Let's have a story.
East Pakistan had no role in the fight against the USSR, so America wanted to shed that extra burden. Pakistani military establishment was always in beds with America, they fully implemented that proposal. Rest of the events were just different shades of grey.
Kesi hai?
One advice, let's stop dumping everything on the Americans. This externalization has already made our nation incapable of introspection.