This work is dedicated to problems brought about by the presence of Muslims in Switzerland. Even though the precise data for these problems differs slightly from one country to another, these problems are practically identical in Western countries where between fifteen and twenty million Muslims live. After a description of the Muslim view of minorities, this work presents Muslims' demands to find out to which level these demands can be taken in account: recognition, freedom of religion and worship, school, family law, food prohibitions and cemeteries. If the Muslim community continues at its present growth rate without adopting a more tolerant system of values, this community will represent a serious risk to the future of the democratic and legal system of Western countries, and will be able to endanger their territorial unity, as in former Yugoslavia. This work is written on a critical topic in this period of extreme global ten-sions. It is exceedingly beneficial for the Muslim community as well as the West. Both groups must learn to co-exist if we are to survive. To analyse problems is the first step in their solution. The Author Sami A. Aldeeb Abu-Sahlieh. Christian of Palestinian origin. Swiss citizen. Doctor in law. Habilitated to direct researches. Professor of universities (CNU-France). Responsible for Arab and Islamic Law at the Swiss Institute of Comparative Law (1980-2009). Visiting professor in different French, Italian and Swiss universities. Director of the Centre of Arab and Islamic Law. Author of many books, including a French, English and Italian translation of the Koran.