This is not about Hindu and Muslim. This is more about 'Indian'. If constitution says that all Indians are to be treated equally, then you cannot have permission to Muslim men having 4 wives legally without allowing anyone to have have four spouses, legally. I doubt you will tolerate Muslim women having legal permission to marry 4 husbands at a time. This is why I think one husband one wife compromise will be best for all Indians -- including Hindu and Muslim.
Further, even if it comes down to Muslims, on the matters like Talaq, I doubt most of Muslim women will be on same page as Muslim men and there are about 80-100 million of Muslim women. There are already demands from Muslim women to ban triple Talaq as a legally valid divorce. You will agree that law making in India cannot be left alone on Muslim men. In these matters, it muslim women are also a party to it and you cannot have a country which treats all citizens equally but defers to Muslim men on few key matters. If Muslim women in general want to end a practice that affects them, I guess we cannot brush that away because a religious scripture says otherwise.
Finally, I will like to clarify, my posts are nothing personal about you in particular but a general idea.
