Contemporary example: Buddhist Inspired Genocide

And you can also check Wikipedia:

Buddhist scripture condemns violence in every form. Ahimsa, a term meaning “not to injure”, is a primary virtue in Buddhism. However, Buddhists have historically used scriptures to justify violence or form exceptions to commit violence for various reasons.

There may be individuals whose personal interpretation of Buddhism leads them to avoid violence, but organized religion as a whole is a social system where a hierarchy struggles to maintain ideological control over their followers on the basis of faith, which is a magnificent tool for anyone who wants to get others to justify heinous crimes against their out-group, and is routinely used that way in all major religions.