Rahul i would like your guts when u try to speak on such a topic. But if we have Harijans in our religion it is mainly bcos of high castes like brahmins. If you are trying to teach the youth equality, are you ready to marry your sister to a Sudhra (Lower Caste)if she falls in love with one.
But though i have my best of friends as a muslim it cant be forgotten that they are only an exception to the majority who are ruthless and senseless when encountered by such critism. I am sure if the person who posted the message had his address mentioned here, he would be burnt alive. (which has happened when Aurangazeb was alive). Forget the past and live peacefully.
God Bless. Doesnt Matter if it is Bhagwan Or Allah.