Hakai no Miko

A high school student in contemporary Japan, Kizaki Souma, is called to another world by an unknown individual. In this world where demi-humans are persecuted, he chooses to oppose the human nations to protect the beastmen who aided him, using knowledge from manga and games. He becomes known as "Soma Kisaki, the Divine Son of Death and Destruction," a figure who will later be remembered as a mass killer and the greatest destroyer in history.