Religion basically is just a vehicle for delivering goods of spirituality, ethics, and morality. If the vehicle fails to deliver the desired goods or it is loaded with unethical and immoral junk by its operators, the recipient can refuse to accept that delivery. And rightfully seek another vehicle which only delivers the good stuff.
In his apostasy, this is what social reformist and anti-caste crusader Dr.Bhumirao Ramji Ambedkar did.
-by Promod Puri
Promod Puri.com 
To some, religion is none of the following: spirituality, ethics and morality. One ethical or moral principle in one religion might be unethical and immoral in another. In an utterly deep religious sense, Dr. Bhimrao Ramji Ambedkar was never a religious personality. He advocated “ scientific temper”. He intended, firstly, to adopt Sikhism but finally converted himself to Buddhism. His conversion was mainly political and social. Some of his 22 vows to new or neo-buddhists are anti-religious (Hinduism). No religion has so far promoted ‘inclusiveness, enquiry and acceptance”. Religion- based democracies have failed utterly.
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Thanks for your comments with an overview and broader concepts of religion. I agree Ambedkar’s conversion to Buddhism personally for him was political and social. It was a protest also. Moreover, he wanted to align his community with a religion which gives dignity and equality to its members and its future generations. Yes, religious-based regimes have failed. But the fault lies not in religion, but because of the fanaticism associated with it. On this topic, please do read my article: https://wordpress.com/post/progressivehindudialogue.com/516
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