No the point is that you are ignoring the obvious in preference of the dubious.link: there are a few ideas in there, recruitment comes from a lot of sources - invasions/regime change like Iraq and Libya are only 1 facet -
they facilitate the so called "power vacuum" (to put it in simple terms)
there are a few ideas in there, it's only 1 source -the point was to get past the facile crap