He’s a man who is the false Messiah in the Islamic traditions. If I remember correctly, he’s not unequivocally mentioned in the Qur’an, but in the Sunni Hadiths, which are the oral traditions of the Sunni faith, he is mentioned all the time. According to Islam, he will claim to be the Messiah and then claim to be God. He will be blind in one eye and will have the word “Kaffir”, which means “disbeliever” written on his forehead. He will persecute muslims, too.