Well over one thousand prisoners were broken free in a brazen assault on a prison in Kandahar this week—around 400 or so of them suspected Taliban. The subsequent manhunt has killed a few dozen insurgents and some escapees returned. It is a rather stark reminder of the scale of the problems existing in Afghanistan today.
So what does Hamid Karzai do? Huff and puff about right-of-pursuit into Pakistan. No one is denying he is correct, and that cross-border militancy is a major problem (though some might quibble with the difference between illegal cross-border attacks and official responses, though the government of Pakistan should show some flexibility). Karzai has problems far larger than being blustery about cross-border attacks, especially if that jail break was not organized by Pakistani militants. His anger is definitely not misplaced, merely his timing.
And here is a bigger question: the ANA, ANP, and whatever other semi-formal security forces (like the Arbakai of Paktya) are completely tied up in trying to keep the peace inside Afghanistan. Where is he going to get an expeditionary or punitive force to cross into Kurram or Bajaur?