Indeed. About 80% of immigrants to Norway and Sweden (and I would suspect those numbers correspond well with other European countries) are economic migrants seeking a better life, not real refugees. And of those 20-30% that are real refugees fleeing from Syria and other areas in war, as much as 70% are young men.

You can still say it's caused by the west to some degree. Our Governments have been enabling terrorist groups for years. Just look at Libya. Ok, so Gadhaffi wasn't a perfect bloke, actually he was quite insane. But the country was doing quite well, especially if you're comparing it to now. Same with Saddam and Iraq, and same with Syria and Assad. Same with all interventions by our governments. The same thing happens over and over again. Trying to bomb them to the same standards and level of democracy we have results in destabilization which Jihadists and terror-groups take advantage of. Turning countries like Libya into mad max-like areas with no control, jihadists enabling and controlling refugee routes, terror organizations working as human traffickers etc. Just chaos.

Also, in this part of the world, Europe has been wrongly put up on a pedestal like something out of a dystopian sci fi novel. Europe is like this sanctuary in their mind, where everyone are filthy rich and opportunities are everywhere and the women spread their legs for every dude that asks. However, when they get here, they end up in a ghetto - poor, and not much better off than before. Then the hatred grows even more, because they've invested so much both money and risk into getting here. Now they feel ripped off. Where is the wealth they were supposed to get for free? Fuck Europeans! They used us and stole our rescources and kept us as slaves etc etc etc. And that's the exact same narrative we're being taught. Now everyone hates europeans. Europeans hate themselves, and everyone else hates them. Based on not facts, but only the fact that europeans are weak and apologetic. Even though our slave trade was way more benign than for example the arab slave trade, WE ended it and apologized. Americans even died in the hundred of thousands to end slavery, a way of life that ALL races and cultures in that time indulged in. But when you show that kind of weakness and apologetism.. you'll ALWAYS be the one that people can blame.

So that's pretty much what's going on.