But as per google Mongols are Buddhists. Hulagu Khan was also a Buddhist. Genghis khan's grandson the great Kublai Khan was also Buddhist?
Did Mongols follow multiple religion by any chance?
Buddhism entered Mongolia in the 14th century and Chengiz was living in the early 13th century. Mongoloia was basically Shamanic but later it was incorporated into the Buddhism they practiced. Many of his descendants took Islam while ruling western and central asia. Any way, they were not preachers of any religion. They were warrior class of people irrespective of religion.
"Buddhism first entered Mongolia during the thirteenth-fourteenth century and was briefly established as a state religion. The cult of Genghis Khan, who had been accepted into the tngri, the highest pantheon of spirits in Mongolian shamanism, became annexed into Buddhist practice as well".