A sin is a wound in the future.
Violence is not wrong—the Bhagavad Gita as one example is an extended justification of it—but it is a distraction.
A violent man will die a violent death because we die the way we live.
A peaceful man will die a peaceful death.
A depressed man will die a depressed death.
An anxious man will die an anxious death.
We daily choose our lives and our deaths.