Ambedkar was a well-learned person. He learnt hinduism more than you did. He experienced harrassment beause that he was born in dalit family. I do not say that one has to accept all his views. But I agree his views on hinduism. I even admire Gandhi but not his views on religion. The people you mentioned could not make many follow them but Jesus did. That is the difference. And only Jesus sacrifieced His worldly life for the salvation of people. This is why now more than 2 billion people are christians. And even among hindus many people wish to be christians and majority of them accept Jesus as an avatar or a great person. Even muslims accept Jesus as a prophet.