You're talking about genocide and religious discrimination.
Wikipedia: Raphael Lemkin, who coined the word "genocide" in the 20th century,[110] referred to the Albigensian Crusade as "one of the most conclusive cases of genocide in religious history".[111]
Wikipedia: Raphael Lemkin, who coined the word "genocide" in the 20th century,[110] referred to the Albigensian Crusade as "one of the most conclusive cases of genocide in religious history".[111]
https://en.wikipedia.org/wiki/Catharism