In his book "The Myth of the Muslim Tide," Doug Saunders puts theories from critics of immigration under the microscope. He talked to DW about extremism, xenophobia and successful integration.

DW: Mr. Saunders, prominent public figures such as Thilo Sarrazin in Germany and Geert Wilders in the Netherlands have indicated they believe that the West is being overrun with Muslims - at least demographically. Is that true?

The visual impression that they're swamping us with children - I think the facts contradict that. I hired a research team, people who are not partisans and weren't activists, but who are good scholars, who know demographics, who know radicalism, who know the history of integration.

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