The problem here is that for many recruits of the jihad there is no life outside of martyrdom. In any societal structure where polygamy is widespread and the rich end up taking the majority of available females there inevitably are numbers of males without prospects for marriage or even dating (in repressive societies).
A sexless male in an economically depressed area ends up with precious little to look forward to in this life. Jihadist leaders have been preying on this segment of society (while simultaneously promoting the rules that allow the segment to grow) for many years.
Yep. this is partially why the whole culture has to go.