I mean, from another perspective, years ago I was involved in my work in looking at populations who were vulnerable to radicalization, particularly in the Middle East, or from a Middle Eastern background living in the west.
The markers for radicalization are pretty well researched and well known. The people who are most vulnerable tend to be poor, socially isolated, they don't have much hope for the future or see a way things could become better. If they feel they have been given a crappy hand unfairly it makes them vulnerable too.
Being unmarried, and with no hope of marriage, is huge. That can be because there are not women to go around but that is also an economic issue - most of these guys are too poor to marry, and in places where some men have several wives that is exacerbated.
The reason for this is two-fold - one is that most people want to marry, have kids, and have a family life. For many places, especially where there are not a lot of material goods, these are the things that give people meaning. And just companionship and a sexual outlet are issues too, I know people don't like that but they are. Poor guys who have no spouse are mostly going to have their sexual lives through porn or prostitution, neither of which contribute to stability. Or not at all which is the best of options but leads to stress of its own.
But the other element is that having a family creates stability because people know they have to remain on the straight and narrow in order to care for them.
I find it really weird that we can know so much in one professional context about what creates unstable populations but it's so unacceptable to admit it in another context.