This theory of conversion is just a humbug nicely propogated by the nonsense organisations like RSS, VHP & Bajrang Dal. If that was the case, Muslims ruled India for 700 years, so by then everyone here should have beem muslims. Nor is any missionary here up to converting others. This is just a ploy by Brahmins to engage the lower castes into the unnecessary fights in the name of religion and they enjoy the real power in terms of economical development, educational, etc.