Me thinks the problem is far from being an economic issue alone. Look at the main course for today's islamization issue, sweden. Sweden had and still has one of the highest standards of living and succesful welfare states of the recent years, with high wages and government programs that helped people with education, housing, healthcare, etc, and yet it has HUGE youth suicide rates. And as much as people might cry about it, sweden is the last place on europe were you'd find a society dominated by "conservative christian rethoric". In fact, if there was such a thing in sweden, then it wouldn't be in the fucking swamp its currently sinking in, at least not in regards to illegal immigrants and islam taking their children away.
People threw away their sense of responsibility with society and cultural identity. They emptied themselves and their children expecting this to open the doors to ultimate freedom, and instead it only made them empty and lonely. They've surrounded themselves with bland, safe, placid lives of no expectations and few responsibilities. They threw their religion away because they though it restricted them rather than make them question themselves, they threw their culture away because they were too lazy to learn about it, they threw their family away because it made them unconfortable at times, so when someone with a strong message, regardless of how insane it is, comes and opens their doors to these people, said people grab onto it, because it gives them something they didn't have in their confort zones: a sense of purpose. Whats worse, society has arranged a system that prevents people from speaking out against said strong message, because its racist and islamophobic to do so, even if clerics go around in the streets telling people what they should and shouldn't do and advocate violence to nonbelievers.
In being too tolerant, people have become tolerant of intolerance.
Families today are feeble arrangements of people who demand love from one another without demanding respect first, where parents are distant because they have to both work and leave their children at school and at home because they are too exhausted to do anything about it when they're not working. That is, if people even have more than one child because this is europe we're talking about, lel.
Thats how your swedish dudeweed bisexual neighbor who faps to /d/ becomes al swedi the decapitator.
Sure, your circle of internet friends may make fun of your catholic neighbor and his housewive wife, who goes to mass, waves a flag during national holidays and ocasionaly hunts and eats a deer or two, but when push comes to shove, its him who's gonna be keeping his family safe and not taking underage concubines and shooting his brothers in the head because hassan the machete jihadist told him to do so.