a bit over the top, but the crusades could be quite bloody https://en.wikipedia.org/wiki/Massacre_at_Ayyadieh https://en.wikipedia.org/wiki/Massacre_at_Ayyadie

a bit over the top, but the crusades could be quite bloody https://en.wikipedia.org/wiki/Massacre_at_Ayyadieh https://en.wikipedia.org/wiki/Massacre_at_Ayyadieh as a general rule though this was also because it was Christians killing non-Christians etc.