That was the Knights Templar, Meebo, Friday October 13, 1307. It is said though, that there were links between the Albigensians and the Templars.I have to say a couple things here, first of all, there is a difference between committing genocide and committing atrocities, and though it may be true that atrocities are often committed, genocides are not--
The next thing is that genocide is not a an irrational, emotional act and not the product of the cycle of hatred and revenge. It is always a planned and carefully orchestrated activity, with clear objectives, usually the acquisition of property, and entails the systenatic elimination of a competing, autonomous ethnic/religious culture that co-exists with the "dominant" or empowered culture.
Genocides are always conceived and executed at the highest levels of power, by presidents, popes, Kings, and their respective high commands. The are not a product of "the mob" although the perpetrators make great efforts to make it appear that they are.
Racism and bigotry are tools that the powerful create and use to muster the support that they need to carry their programs out--Racial tensions and bigotry, even when they result in violence, are not enough to result in a genocide--there have to be opportunistic leaders who deliberately exacerbate the tensions, and then direct the crowds to do their will--