The word "genocidal" refers to something that is related to or characterized by the intent to kill or destroy a large group of people based on their ethnic, religious, or national background.
(This kind of biblical justification of genocidal violence against the native peoples of North America continued throughout the 17th, 18th and 19th centuries.) (relevantmagazine.com)
Are you so DELUDED by your cult of Islamic victimization that you want to cry about the Crusades - hundreds of years after they ended - even as your coreligionists engage in genocidal war against other faiths TOODAY? (religion.blogs.cnn.com)