In what ways could Simon de Montfort seen as both a hero and a traitor?

Simon de Montfort was the leader of the crusaders during the Albigensian Crusade in the Middle Ages. However, there is some disagreement as to whether he should be consider a hero or a traitor.

Simon de Montfort is presented as a heron in Historia Albigensis by Peter of les Vaux-de-Cernay, a monk from northern France. On the other hand, the Song of the Cathar Wars is an epic poem that was mostly written by anonymous southern writer. He was critical of Simon de Montfort and considered him a traitor.

In the first text, Simon de Montfort is presented as a brave and devout Christian who was missed by all when he was killed. However, the second text adopts the perspective of the men killed by Simon de Montfort. This account portrays him as a villain and blood-thirsty man who brought great pain everywhere he went.