User blog comment:BainTheCool/Commenting PSA/@comment-30924651-20170526201605/@comment-26478081-20170527213150

The Mongols, although they are aggressive ( and also, "the exception" to almost any empire ), actually let people practice whatever religion they want when the dust settles (after taking over a village), whether it's Christianity, Islam, or any other religion. In other words, they were tolerant. This info came from famous YouTuber vlogger John Green in one of his Crash Course videos ( where I got "the exception" part from ).

Source Link: https://youtu.be/szxPar0BcMo?t=8m4s