And regarding arny's support to Taliban during 90's, we can now see that it was a mistake(hind-site is always 20-20) but i don't think army had any other option at that time, because Indian influence in Afghanistan was growing by the day at that time, India with help of Iran were supporting Northern Alliance.
You call it a mistake? Mistake is mounting an exaggerated hostility against India at Wagha border, harmless entertainment that.
Pak army's support and nurturing of Taliban is destroying Pakistan today.