Inversely, the Orthodox religion is automatically associated with Russia.

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Ms. Tsarnaeva, in a recent interview with The Wall Street Journal, said she often visited many of the same Internet sites as her son, as the two exchanged ideas on religion and adopted more orthodox Islamic practices.

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Religion is more diverse, unlike in the East, which is almost exclusively Christian Orthodox.

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There, the head of an Orthodox Christian Seminary said secularism could not take on militant Hinduism because the value Indians put on religion could not be ignored.

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While Jews regularly practice circumcision as part of their religion, metzitzah b'peh is limited to a relatively small number of ultra-Orthodox Jews.

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