You totally have the right to voice up against this. Your wife and her family don’t have any right to force you to follow any ritual against your choice.
If you don’t want to perform any ritual then they can’t force you to do it. Articles 25 and Article 26 not only prevent doctrines or beliefs of religion but also the acts were done in pursuance of religion. It thus guarantees ceremonies, modes of worship, rituals, observances, etc which are an integral part of religion. If you are feeling that you are being forced into some rituals or superstitions then you can definitely seek help from the court.