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Minority groups like the Sufi Muslims say they are also witnessing increasing attacks on their places of worship.

I began to pick up some of the wise writers in the Western tradition — Meister Eckhart, Etty Hillesum — no longer convinced that Sufis or Buddhists owned a monopoly on wisdom.

Her teachings, rooted in Sufi traditions, attracted many followers - including Khan himself.

His followers helped bury the dead, and at night they performed zikir, a devotional dance that is an expression of Sufi spirituality.

The flautist put down his instrument and sang out a Sufi chant.