"Muslims had two more advantages in addition to their aggressiveness and superiority in the art of warfare. “During this long period of Indian resistance”, observes Dr. Misra, “the infiltration of Arabs, and later on the Turks, continued almost unabated into India, both through armed invasions as well as through peaceful migration from Central Asia. The Hindus, true to their catholicity of religious outlook and rich tradition of tolerance, never obstructed the peaceful immigrants and even zealously granted them security and full religious freedom… The greatest Chishti saint of India, Shaikh Muinuddin Chishti, came to Ajmer just before the battles of Tarain and was able to attract a number of devoted followers… It is all the more remarkable that this Hindu tolerance towards the Muslim merchants and mystics should have continued even after the invasions of Sultan Mahmud of Ghazni… As Professor Habib points out, ‘the far-flung campaigns of Sultan Mahmud would have been impossible without an accurate knowledge of trade routes and local resources, which was probably obtained from Muslim merchants.’ The same can be said to hold good about the invasions of Muhammad Ghori or Qutbuddin Aibak.” The sufis were working not only as the spies of Islamic imperialism but also as deceivers of gullible Hindu masses."