Yesterday, I looked into Buddhist violence in Burma. That may sound like a contradiction to you, but there is a group of violent Buddhists in Burma (Myanmar) and there is one in Sri Lanka too.
If you want to read up on it, follow these links:
Article in Time: How an Extremist Buddhist Network Is Sowing Hatred Across Asia
Article in the New York Times: Sri Lanka’s Violent Buddhists
Article in BBC News: The darker side of Buddhism
Article on Al Jazeera America: Myanmar’s Buddhist terrorism problem
Article on the CNN site: Dalai Lama to Myanmar, Sri Lanka Buddhists: Stop violence against Muslims
Article in Time: Burma’s Hard-Line Buddhists Are Waging a Campaign of Hate That Nobody Can Stop