Answer:
Probably only their target, and their method of destruction.
Explanation:
When examining human conflicts through sociological perspective, deciding one certain party is evil and which party is good tend to oversimplify a complicated situation.
Conflicts tend to be caused by difference in ideologies or goals.
Every parties involved will believe that they are the 'right one.' Even when they're killing other innocent people in the process, they will justify it with the values or religion that they hold.