Violence in defence of person and property is just.

One doesn't need to prove this with evidence.

The State is a coercive and violent entity by nature.

It will not defend.

It will only aggress against people and their property.

It is the most violent criminal.

Being against such an entity doesn't require proof or evidence.

The same logic you applied while implicitly assuming that a violent criminal needs to be punished applies to governments as well.