Thank you for this explanation Sir Lal. For complete what you saying arahant Maha Mogallana was the mara devaputta in the sasana of lord Buddha Kakusandha and the uncle of the actual mara devaputta. He commit many misdeeds against the samgha and reborn in the niraya for a very long time.
Many buddhists have the wrong view (include me before) that mara devaputta are the pure evil and the same being throughout the eons just like satan in christians religion. With this clarification we understand he just another being who are trap in the samsara and he can achieve Nibbāna aswell.