Do you think Europe will create stricter laws on crossing borders now?
In light of the African and Syrian refugees crises (sub-Saharan African have been crossing the Mediterranean in large number for many years) there should be more controls on the outer borders of the EU and Schengen Zone, but it would be futile to reinstate border checks between Schengen Zone countries. They should especially reinforce sea patrols along all the Mediterranean coasts.
But that's just a way to curb the immigration problem. Islamic terrorism is usually "home-grown". Almost all attacks in Europe over the last 15 years were perpetrated by Muslims born and raised in Europe, typically in impoverished ghettos.
There are two distinct problems:
1) The social and financial pressure caused by the hundreds of thousands of illegal immigrants and refugees from Africa and the Middle East, and the difficulty to integrate them economically, socially and culturally.
2) The problem caused by second or third generation (chiefly Muslim) immigrants who couldn't integrate.
I doubt that a lot of recently arrived immigrants are going to become terrorists, because they arrive full of hope for their future. When their hope turn in disillusion, they pass their resentment on their impressionable children, who grow up resenting the whole host country. It only takes a few smooth-tongued Islamic extremists to turn those disgruntled second generation youths into terrorists.
Unfortunately the source of the problem is that immigrants and refugees come to Europe with unrealistic hopes, imagining that they will live dream lives like Westerners they see in Hollywood movies, driving expensive cars and dining at Paris's finest restaurants. Even when they aspire to regular middle-class lives, most of them cannot reach that level because they arrive with very little education and do not speak the local language properly or at all.
Many Maghrebis who grew up in "ghettos" in Belgian or French cities still speak with a strong Arabic accents even after two or three generations (especially men; for some reason women seem to lose their accent more quickly). Unfortunately for them the Arabic accent is one of the worst sounding foreign accents in French. The harshness of Arabic clashes with the softness and delicacy of proper Parisian French. And like everywhere else people are judged by their accents. So when a Moroccan French turns up for a job interview with an irritatingly harsh accent, it is no wonder that his chances aren't the same as those of another 2nd generation immigrant, say from sub-Saharan Africa or India or East Asia with a much milder accent.
It's not even a matter of religion. Turkish, Indian and Indonesian Muslims seem to adapt much better in Europe than their North African counterparts. Actually, almost all terrorists attacks in Europe over the last 15 years were of Arabic descent. In the Netherlands there are about as many people of Indonesian, Turkish and Moroccan descent (about 400,000 each), but the Moroccans seem to be causing most of the problems, like torching cars. Germany has 4.5 million Muslims, almost as much as France, and yet no terrorist attack or car torching have taken place there like the the Benelux, France and Spain. Why ? Most Muslims are of Turkish descent. Ethnicity does matter, and in fact it appears to matter more more integration and risk of terrorism than religion alone.
