This is because nothing was done to disabuse them of the belief system that motivated their jihad activity, since so many Pakistani authorities hold to that belief system themselves. This whole catch-and-release game is a show for the West, to show the endlessly foolable American Infidels that the Pakistanis are doing something about terrorism.
“722 suspects rejoined terrorist groups after acquittal: report,” by Malik Asad for Dawn, October 19 (thanks to Blazing Cat Fur):
ISLAMABAD: From 2007 till now the courts have released 1,964 alleged terrorists, says an official government document.
More serious still is the fact that of those released, 722 have rejoined terrorist groups while 1,197 are still actively involved in anti-state activities, according to the official document available with Dawn.
In other words, the document reveals that nearly 60 per cent of those acquitted of terrorist activities are still involved in anti-state activities. Though the wording of the document is vague it appears to suggest that those being monitored are still involved in militant activities….