“The bloodlust in revolutionary civil wars stems from the apocalyptic nature of such contests, the attempts on each side to create a new society and cultural order, not merely a different political system, totally purged of antagonistic elements. In these conflicts the enemy is perceived not as an ordinary political rival, but as a kind of metaphysical incarnation of evil that must be eradicated before it infects, or imposes the same terror on, one’s own side. A revolutionary civil war is not an ordinary political contest, but a contest of ultimates about society, religion, and culture, perceived to demand a total and uncompromising solution.”
~ Stanley G. Payne, “The Spanish Civil War” (Cambridge University Press, 2012) pg. 103