Afghan sovereignty? Who the hell is US-installed and CIA paid-for Karzai to piss and moan about Afghan sovereignty?
Of course the US has no respect for Afghan sovereignty! Who does Karzai think provided all those billions he has stashed in Dubai and Switzerland? Does he believe for a moment those riches were a reward for his stewardship of Afghan sovereignty?
Let's set the record straight; Karzai was never about Afghan sovereignty; he was installed by the US and has been maintained in power by the US as the best of a bad lot, at least from the US perspective.
So when the puppet ignores the strings and embarks on initiatives such as freeing Taliban prisoners, he knows in advance that he's going to ruffle a few feathers.
I'm betting there's a Hellfire missile attached to a drone with Karzai's name on it right now.