How 786 made its presence in Islam

Islamic critics should not forget that Hindu religion is 10,000 year old compared to Islamic religion which is 1500 years old and chances of some old Hindus starting a new religion are very much high. The reverse direction of arabic text might have caused the letter OM to be mirrored. Owing no religious significance of the mirrored letter, scholars best interpreted as 786 of devnagari script and it became 786, the holy number in Islam.