But it does not cover the question of: If you kill a killer then do you not invite to be killed?

Suppose that some stranger murdered someone in your family and you went and murdered that person, then (according to the “Do unto others as you would have others do unto you.” [Matthew 7:120] ) you should be murdered also, but then if someone does murder you then they also should be murdered.

It seems to me that such a loop of murders will never end.

What is your viewpoint of such a thought?

Action and reaction is a bit more complex when it comes to humans. There are lots of types of killing from manslaughter to 1st degree murder.

When one knows that each action creates a set of wave forms with particular biases, and that this set will either attract or repel certain types of actions based upon frequency and harmonic relationships, then one learns that all previous actions generate subsequent events.

So a murderer carries with him a field of energy which has a certain frequency, etcetera. Depending upon the extent of the bias of these stored signals will determine the nature of the reaction.

If you kill someone with extreme hatred and prejudice, you will have stored signals which will quite likely put you in mortal danger because these signals will seek balance and one of the balancing options for these signals will be that you are murdered.

If you accidentally hit someone with your car, that results in their death and did not intend to kill someone, the biases are slightly altered. There is not the same degree of bias. This act will regenerate and you may find yourself on the receiving end of other people's carelessness that likely result in injury to yourself...but not necessarily death.

Once balance is achieved, that particular set of waves no longer attracts anything when the cycle loops around again. Only imbalanced waves create harmonic attractions. This is why life is generally one big challenge and a messy affair. It is why everyone is generally unsatisfied and unhappy. Humanity moves around constantly expressing and acting from these imbalances.

Imbalance is the motive force in our lives.

The timing of the cycle and its regenerations are not able to be predicted at this time. So someone may kill someone and may experience low grade repercussions for years until the cycle returns in a major manner or even in a future lifetime depending upon how complex their set of structures are. More developed folks experience more time between regenerations while less developed folks regenerate such things more quickly. All the cues have evolved and the original collection of waves are now all back at the focal point of that person's life. When the subcycles of this experience had come up in the past, the person has the opportunity to do a certain amount of balancing or compensation.

If the person has softened some of the strongest biases and equalized many of the subharmonic waveforms which comprise the greater event and the circumstances and emotions which surround it, then the individual will soften the blow. He may simply be beaten up horribly or injured severely. Death is not always the best compensation for murder because the person can't rationalize and counter their acts if they simply die as a response. So they suffer instead and this suffering can be used as a tool to further balance the hate and their past destructive acts.

Only by realizing their pain and suffering of their own making does one move forward, balance these waves and free oneself from that particular negatively regenerating cycle.

Yes every act, every insult and injustice we receive is of our own making even if at the moment we experience it, it seems horrendously unfair or undeserved. It is at this time when one "turns the other cheek" and employs positive attitudes, feelings and understanding to these things we bias negatively. That is when cancellation or, more properly, balancing occurs to these stored waves. We can never discharge what we are, but we can add new waveforms to existing ones which balance imbalances.

We will always carry a measure of imbalances and these will direct our lives. If we want to control our lives more fully - we must master our imbalances and truly begin to take charge of life, instead of it seemingly being happenstance. And this starts by recognizing all things that happen to you are caused by you and that it is natural to move from one imbalanced situation to another.

Experience, bias & subsequent compensation is the motive force behind all evolution.