Nah. You can be anti-violence, pro-violence, or understand that violence is acceptable only as a means to achieving a desired result, oftentimes as a last resort.
Both the first and third options are not proponents of violence, but the third understands it is a necessity to achieve their goals at times. This is literally heavily discussed now as fascists try to paint anti-fascists as the violent ones when anti-fascists merely understand violence as the means to a goal in this case and not their normal path to a goal.