This month community cohesion minister Parmjit Dhanda said the UK should "celebrate" the role of Christianity in the country's heritage and culture.

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"For 5, 000 years, every culture and every religion -- not just Christianity -- has defined marriage as a contract between men and women, " Warren wrote in a newsletter to his congregation.

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But the right-wing Swiss People's Party struck a chord by telling voters that there was still a binary choice: either they would be subjected to misogynism and cruel punishments in the name of Islam, or else their existing culture, based on liberal Christianity, would prevail.

ECONOMIST: Islam and Switzerland