Germany's stepped-up efforts to ban some Islamic groups for promoting radical views have sparked a national debate over whether the government is violating the free-speech protections of the constitution it says it is aiming to protect.

The German government's latest move to crack down on groups that promote extremist Muslim teaching came earlier this month as police raided homes, offices and religious schools in Bremen, Braunschweig and Mönchengladbach. The security forces were seeking evidence that could lead to the banning of two organizations that officials say are calling for imposing Islamic law in place of German law.

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