Kasab is additionally a live human reminder to the world, and a constant source of embarrassment for Pakistan.
I can see how the government might be tempted to keep him alive, just because of the above.
>embarrassment for Pakistan.
Impossible. Too much chutzpah and a Machiavellian mindset means the JihadiMilitary Complex of Islamabad see this as a weakness of India.
An explicit PakArmyJihadi attack that killed scores. And India’s response.......
India hasn’t done squat.
The Generals laugh, and ponder how much further can they press Pakistan’s advantage with Washington.