If Pakistan had to provided Support to US, India was there, since it was not like 100 years ago, one can search the news item/statements of Indian Govt/politicians, offering USA all the support it may need… the only difference would have been that war would have been in Pakistan and not in Afghanistan… So it was wise decision… although forced one… more over, there was a resolution of UNO as well… so by not allowing/cooperating, Pakistan would have been a non-existent entity by now…
Any political leader saying he opposed it or he was/is against it is just for political mileage and nothing else…