Via the Hudson Institute:
Muslim countries in the Persian Gulf and North Africa are funnelling large sums of money to radical Islamic groups in towns and cities across Spain in a competing effort to exert control over the estimated 1.5 million Muslims in the country.
A newly leaked secret report prepared by Spain's National Intelligence Center (CNI), excerpts of which were published by the Madrid-based El País newspaper on July 31, says the Spanish government is struggling to stop the flow of tens of millions of dollars to Islamic groups in Spain from Kuwait, Libya, Morocco, Oman, Qatar, the United Arab Emirates and above all Saudi Arabia.
The CNI report states: "The financing is having negative consequences for [multicultural] coexistence in Spain, such as the emergence of parallel societies and ghettos, Islamic courts and police that operate outside of Spanish jurisprudence, removing girls from schools, forced marriages, etc."(source)