The allegations are serious, which is why Christian Action Network took more than two years to research Muslims of America going inside the compounds with their video cameras and questions to confront violence and confirm the truth.

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Mr Smith is being supported in his legal action by The Christian Institute, a national charity that defends the religious liberty of Christians.

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"We'll be looking at thousands, hundreds of thousands, even millions of deaths if we don't take action now, " Christian Aid spokesman Dominic Nunn told the BBC.

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