Pretty much your usual profile of western converts to religious sects. Islam is just the "religion du jour" these days, in the past it has been the Hare Krishnas, the Children of God, the Maharishi...

Young people with disordered lives but usually some strong religious background they reject as not demanding enough. Have read of many Catholics rejecting Catholicism and Christianity in general as too complex a faith, it demands too much nuanced thinking, Islam is so much simpler and straightforward.

So said Lawrence of Arabia of the Arab Muslims: "They were a people of primary colours, or rather of black and white, who saw the world always in contour. They were a dogmatic people, despising doubt, our modern crown of thorns. They did not understand our metaphysical difficulties, our introspective questionings. They knew only truth and untruth, belief and unbelief, without our hesitating retinue of finer shades." 

A very appealing view of the world to some people...