Some people are 'searchers' imo, looking for a path that helps them manage the difficulties that life presents us all with, gives a sense of certainty. The Muslim faith, so far as I understand it, accepts that God has a path for each of us, that our lives are in God's hands. That doesn't seem too different to the way in which some Christian's believe.
A friend's brother has gone through almost every faith known and is currently a Muslim. This is probably in part due to the fact he works with a lot of Muslim men and he himself is vulnerable in some ways, to persuasion. His family are of course worried, but when he was ill recently young men from his Mosque were incredibly supportive and kind to him and his parents.
A poster on another thread recently mentioned the 60's and the way in which many idealistic young people were drawn into cults. It may have been annodomini, apologies if it wasn't. One of our close friends told us recently that he'd been involved in a cult when in his late teens. He'd been out of control, using drugs etc and was drawn in by their street people. He had a period of real stability and faith before he finally left a few years later. His involvement enabled him to get his life back on track.
Another friend now in his 70's joined the Temperance Society when in his teens. it seems funny now, but filled a gap in his life at that time (now he'd say anyone for another beer?)