The article considers topical issues of the implementation of migration processes on a national and global scale. In particular, a comprehensive research of the reasons and conditions for the emergence and spread of threats of an extremist and terrorist nature connected with legal and illegal migration, including persons professing Islam, was carried out. Emphasis is placed on the prediction of the development of existing and possible migration risks due to the current geopolitical situation.
 The main focus is on the analysis of the legislative initiatives of the French Republic concerning countering religious extremism caused by the intensification of migration processes from the countries of Africa and Asia. In addition, the article gives a detailed description of the problems of migrants and refugees during their assimilation, which can be used for illegal purposes, including those aimed at involving them in extremist or terrorist activities. At the same time, the state of the native (local) population associated with uncontrolled migration which can lead to migrant-phobia, protest activity, radicalization of society and destructive activity are described. Also, the interrelation of extremist activity with the radicalization of religion is not put aside.
 The study of migration processes in the European Union and the law-making of the French Republic in this field made it possible to develop author’s recommendations for improving the law-making work, law enforcement practice, law enforcement and human rights activities in this segment of ensuring national and collective security.