Manish is right in saying that Islamic rule caused a lot of misery to India. But India's misery is not all due to past Islamic rule. After the demise of the Moghul Empire, the Marathi reshaped India into a prosperous country again. When the British took control of India, the started to systematically destroy Indian civilisation, and 200 years of British rule caused more misery to India then 800 years of Islamic rule.
World Jewish Congress: Nazi train treasures must go to rightful owners (Reuters)
from the article: Cabinet to meet over expansion of ground operations