both sides

A variant of what is known as the 'thou also' or 'tu quoque' logical fallacy. In popular usage, a refusal to admit the one side of an issue is wholly responsible for violence, injustice, disruption, intransigency etc. Rather the more nebulous, and often completely untrue, 'both sides' is referred to in order to obfuscate guilt, shift blame, and otherwise distract from the seriousness of the events at hand.