Osama , Pakistan, terrorism - A connection

I really wonder that if US had been too strict with Pakistan and put enormous pressure on Pakistan ISI /Army to dismantle terror nursuries/seminaries then a lot of American taxpayer money and precious American soldiers life would have been saved, I really do not know why US govt handles Pakistan so softly and gives billions of dollars aid which indirectly funds terror structure which ultimately results in American taxpayers loss of lives across the world. Mere getting Osama is not enough we need to destroy all terror nursuries/seminaries shut for ever. After Osama's killing in Pakistan Army's cantonment area do US still requires proof to come hard on Pakistan ? Come on, whom are we fooling but ourselves. Even a beat constable will be worried if he finds such suspicious building with suspicious/unuasual activities taking place try to peek inside out of sheer curiosity and report the matter to his superiors !!!