A bit off topic but cant resist discussing the Hashashin who were also present at the time of crusades and carried out a lot of high profile assassinations.
The Assassins or the Hashashin are the forefathers of our modern TTP outfit in every way...
The Hashashin were high on drugs and were shown the pleasure of heaven via beautiful gardens, seductive women, drinks, food and many other luxuries. They were convinced of being a holy order.
However, you had to be a devoted killer to be able to enjoy this heaven, otherwise exile without the drugs and other things was unbearable.
This was all created via heavy investment but the return on Investment was quite good as the Hashashin were the most feared assassins of their time. Twice their agents infiltrated Salahuddin's bedchambers as a warning from the order to discourage action against them and in this they succeeded as they were considered a hornet's nest which was to be left alone.
Moral of this story, drugs can also be deadly for people other than the drug users....
Coming to TTP...
The use of drugs in ample dosage coupled with active indoctrination/motivational sessions has been carried out by nearly all of these Terrorists outfits.
There is a reason you see so many suicide bombers... the poor kids are drugged and driven out of their senses so that they do not feel fear and shock like a normal person.
When we see the youth abandoning their families to join the fighters, it is a combination of peer pressure, indoctrination and drugs.
Unfortunately most of the youth are sacrificed by the veteran terrorists who treat them as cannon fodder. These youth are used in suicide attacks via bombings on unsuspecting targets or in active combat theater via frontal attacks on the military to help their brave commanders escape
A most unfortunate reality of this war.