“Small wonder that we find them flocking everywhere ahead or with or in the wake of Islamic armies. Sufis of the Chishtîyya silsila in particular excelled in going ahead of these armies and acting as eyes and ears of the Islamic establishment. The Hindus in places where these sufis settled, particularly in the South, failed to understand the true character of these saints till it was too late. The invasions of South India by the armies of Alãu’d-Dîn Khaljî and Muhammad bin Tughlaq can be placed in their proper perspective only when we survey the sufi network in the South. Many sufis were sent in all directions by Nizãmu’d-Dîn Awliyã, the Chistîyya luminary of Delhi; all of them actively participated in jihãds against the local population. Nizãmu’d-Dîn’s leading disciple, Nasîru’d-Dîn Chirãg-i-Dihlî, exhorted the sufis to serve the Islamic state. “The essence of sufism,” he versified, “is not an external garment. Gird up your loins to serve the Sultãn and be a sufi.” Nasîru’d-Dîn’s leading disciple, Syed Muhammad Husainî Banda Nawãz Gesûdarãz (1321-1422 A. D.), went to Gulbarga for helping the contemporary Bahmani sultan in consolidating Islamic power in the Deccan. Shykh Nizãmu’d-Dîn Awliyã’s dargãh in Delhi continued to be and remains till today the most important centre of Islamic fundamentalism in India. (…)”

Hindu Temples – What Happened to Them, Volume I (1990)