Re: ''deranged sys admins''
Insane / crazy / deranged / mad etc are literally a connotation of mental illness. ie something is wrong in the brain hardware, this is stuff that cannot be fixed or needs heavy medication to control. These terms are also very often used to describe people where something is wrong with their belief systems ie their internal mental map of the universe is screwed up.
I believe there is absolutely nothing wrong with the jihadis' brain hardware and thought processes. If someone's truly and deeply held beliefs are (there's an all powerful god who hates those who don't obey and wants them killed, and those who kill the infidels will be highly rewarded for eternity in heaven, which definitely exists) then it is indeed a logical and perfectly sane thought structure that will lead them to go blow themselves up in a crowd.
Of course it also requires huge levels of cognitive dissonance to be able to hold those beliefs while living in the real world, but hey, humans are ace at cognitive dissonance. The good news is that these people are fuelled by bad ideas, which are possible to fight back against using good ideas, not more bombs.