Source: http://www.hinduhistory.info
(Tongue-in-cheek. For pictures, go directly to site through url)

As Christianity expanded leaving in its trail genocides,pillage and the destruction of indigenous pagan traditions it couldn’t always break the spirit of the common people it persecuted who still prayed to the old gods and celebrated them in most cases secretly. So the church had another method of destroying the ancient traditions by Christianizing the traditional pagan festivals and legends.For example Easter and Christmas are really old pagan festivals but now Christianized . This was the art of inculturation which still continues and Hinduism being its biggest target.