If the targets hit in Pakistan were enemies of Pakistan and the US, carried out with the cooperation of the Pakistan government, then they were not attacks on the Pakistan government.
Just as General Andrew Jackson attacked pirates on an island off the coast of Florida that then belonged to Spain, when a power can not control its territory, it loses claim to sovereignty.
I see.
So we've lost our sovereignty along our border?
Does that mean Washington has no claim on, say, Arizona?