Just as threats of violence are morally equivalent to acts of violence

Threats of violence are bad. Threats of violence are bad because acts of violence are bad. Some of the moral badness of acts of violence flows into threats of violence and makes them bad too. Threats of violence should not be tolerated.

Threats of violence are not morally equivalent to acts of violence. The fact that we're talking about practical real-world morality is no excuse to lose our ability to think quantitatively.