The situation is very unstable there and an unfriendly future government would be a significant problem and could allow al Qaeda a free hand.
In the mean time, if lots of bad guys kill each other, I’ll stand by and watch.
U.S. National Interests get involved when there’s only one guy left standing. Then we can send in Seal Team 6.
Speaking about Pakistan:
Deepening Involvement by China in Pakistani Military Affairs
China Warns U.S.: ‘Any Attack On Pakistan Would Be Construed As An Attack On China’