Oh ... in Iraq the jihadi’s have been known to hype-up on amphetamines in order to bolster their ‘courage’.
‘Speed’ in high doses can help you focus on the mission and ignore pain.
These ‘docs’ would certainly have access to the right motivating pharmaceuticals.
Just like the sammies do with khat...
The term ‘assassin’ comes from an earlier group of muzzies who used hashish before their dirty deeds.