The influence of Islam in Europe even in the middle ages was diverse and versatile, this has affected to a greater or lesser extent for all levels of European society, which covered a variety of areas: household, trade and economic, technical, political.In Western Europe Islam came just a few decades ago. Up until the late 1940s Muslims there almost was not, or was quite a bit (mostly in France — 120 thousand in the middle of the 1920s). First of mass migration was connected with the war in Algeria (1954-1962). After the forced consent of France on the proclamation of independence of this North African nation hundreds of thousands of Muslims took advantage of an opportunity to move to his former metropolis.The growth in the number of European Muslims contributes encouraged public social programs high fertility. In Muslim families, the average number of children, as a rule, not less than four. Possession of many children of Muslim families contrasts with малодетностью and the crisis of the traditional family values among the indigenous Europeans. The most important democratic achievement of modern Western civilization proclaims the freedom of homosexual relations, and in some countries (the Netherlands, Belgium, Canada, Spain, and Switzerland, and a number of US States) were legally allowed same-sex marriages.Europe was the scene of the activity of Islamic terrorists, who organized the explosions in Madrid and London, as well as the murder of Dutch film Director Theo van Gogh in Amsterdam. While terrorism is caused not only by internal reasons, but the processes that occur within the Muslim communities of Europe. Many participants of the terrorist attacks on the US of September 11, 2001, were Muslims of European countries, where was formed their world view that denies the liberal and democratic values. Most committed the attacks of 11 March 2004 in Madrid were also young Muslims belonging to the second or third generation immigrants. They were not linked to foreign terrorist organizations, though they declared that are the followers of al-Qaida. The group included the inhabitants of Madrid and equal citizens of Spain (mostly of Moroccan origin) , who have recognized the radical ideas under the influence of the information that they get on the Internet on Islamic websites. The same pattern was observed in the UK, where the London terrorist attacks on 7 July 2005 were implemented young Muslims full — fledged British гражданами. На our eyes Islam became an important factor in European public life and without taking into account this factor cannot be any serious prognosis of the future development of Europe, and the whole modern world. We see that a significant part of Europe's Muslims did not integrate into the European reality and consciously refuses to accept the Western European way of life, morals and values. A growing number of Muslims prefer to live within their own community, exclusively by its own laws and not even speak the languages of their countries.