"If the U.S. cuts off Pakistan, Musharaff goes and Pakistan becomes fundamentalist and belligerent, don't you think?
Do you think this will be good for the U.S. and India?"
Mush wont go if US cuts off pakistan. Mush wasnt installed by the US. He installed himself through a coup which incidently the US deplored at the time before 9/11 happened. After 9/11 the US made the folly of feeding the snake hoping to fix the problem against Indias better counsel and now the snake that Mush is.. knows that he needs to keep terrorism alive if he wants american money.
Right now the US policy is too carrot heavy. There is no stick. Show him the stick and once he realizes that International isolation aka saddam will follow unless the genuinely cleans up the country , you will see better results.
We know this very well in India. Also remember it was India that had warned the US about Pak's hand in terror all over this part of the world including afghanistan and the US ignored it to its peril before 9/11. US needs to open its eyes and see who its really allies (shared values) are.