I am totally against this "Panchayat" system as they are not equipped and authorized to handle such cases, Hindus or Muslims.
The place we differ is where you say that the decree given to the Muslim Husband was based on Islam but NOT on Ignorance/illetracy.
In Islam the punishment for RAPE is DEATH. If they were following ISLAM, they should have RECOMMENDED the DEATH sentence to the "FATHER-In-LAW". I say recommended because they DO NOT have jurisdiction to handle such cases.
you can blame ISLAM all you want. The problem lies some place else.