What caused the terrorist attacks in Paris?

France is the country with the largest number of Muslims in Europe, mostly from former French colonial countries such as North Africa. Statistics show that there are about 6.5 million Muslims in France, accounting for 10% of the total population of France, and about half of them have French nationality.

In fact, the recent wave of refugees is in line with France's acceptance of immigrants from neighboring countries and the world for decades. Many people in French political and academic circles believe that many problems in France are related to immigration, including the proliferation of terrorist activities.

Some experts believe that if the immigration issue is not handled properly, it will lead to a collision between civilizations, which can be easily exploited by extremists.

In terms of counter-terrorism measures, compared with other countries, France's own management is relatively free and loose, which also provides the soil for terrorists to launch such attacks.

What exists behind the terrorist attacks in Paris is the "hidden disease of terror" throughout Europe. The terrorist attack on Charlie Hebdo at the beginning of the year is already a sign. Some analysts believe that a series of cases at that time were more like "training" and experiments of terrorists.