Q. Can a Muslim male (only boy to his parents) perform funeral rites for his Hindu father? There may be no one else to do it.
A. In performing such rites, one will have to perform certain rituals which are connected to the beliefs and ideologies of another religion, which are opposed to the teachings of Islam. Hence, it will not be permissible for the Muslim son to perform the funeral rites of his hindu father which is done according to the practices of Hinduism. If it is a matter of burial, then the Muslim son can do this, however, when it is connected to cremating the body, shaving the head and other similar rituals, these are totally unlawful in Islam, and one is prohibited from doing these.
And Allah knows best.
Mufti Waseem Khan