The reason why USA is baying for pak blood is because:
1. Pakistan is in China's camp and USA is getting serious about undercutting China.
2. USA's ,dependence on Pakistan, has reduced to zero after withdrawal of bulk of US forces.
3. (main point) USA relation with Iran are improving rapidly. Iran is 10 times valuable as an strategic ally to USA as it influence CAR, could contain USA and keep Arabs under pressure at same time.
4. Pakistan has been unable to deliver upon its promise to bring Taliban on table ,either due to lack of will and competence; but most importantly (a point which lot of stupid Pakistani posters so blatantly miss) Pakistan was unable to do so after PROMISING USA that it would do so. This project serious weakness as it gives a message that (a) Pakistan does not control Taliban OR (b) is playing double games with USA's establishment. This get Pakistan classified as useless or treacherous; both labels are harmful for Pakistan.
5. Elections are coming and Muslims ,today, are generally hated in west + Osama was found hiding next to your military academy, so there is a lot of popular public anger against Pakistan.
6.. India as a partner offer much juicer opportunities to USA. You people talk about access to CAR. It do not understand how come access to such a shith0le would matter. Indian economy is 9 times bigger than that of CAR combined (nearly 20 times on PPP basis). Instead Indian economy is bigger than that of CAR, Iran, Afghanistan, Pakistan, and Iraq's economy combined, which in conjugation with India's ability to check China's influence means that an alliance with India has more strength than alliance with half of Asia. Even ,purest of Muslims -Arabs- are cosying up to India because of that.