There is a difference between making presumptions/passing judgement and simply stating the truth of a particular situation. A presumption would be if the author had said "I bet he took drugs or drank a lot or was abused as a child", without knowing if any of that is true or not. Instead, the author laid out what are the cold hard facts of this particular case, and backed it up with long-proven behavioral analysis of abusers and the abused. It is what it is.
You may have known what sort of person the younger Mr. Lake was, but NO ONE (not even you) can ever truly know what goes on in another person's mind. The senior Mr. Lake is trying to rationalize a situation that cannot be rationalized. And we will never know his motives because he took it to the grave instead of facing up to his crimes and accepting responsibility for them. In essence, those who did know him are also only able to make presumptions.
While I agree that people can at times be too quick to judge, it is extremely prevalent in today's society for people to blame Mommy & Daddy for their problems. It's everyone else's fault that they make inappropriate choices, and are miserable and don't get what they presume they are entitled to. What they need to do is grow up and take responsibility for their actions. If your situation is bad, then do what you need to do to change it, BUT DO SO IN A HEALTHY WAY.
Regardless of how we are raised, we are all given the same chance to make the choice of which life path to follow. Some choose to repeat toxic behaviors because that is all they know. Others choose to go in the exact opposite way of how they were raised. Some have the emotional strength to get through it and instinctively make the right choices, while others, such as myself, occasionally need the help of a therapist and medication to help us find and keep us on the right path.
That all being said, there is absolutely NO logic and NO excuse for killing your spouse and children. If life were a Shakespearean play, it might still be considered romantic to die for love, like Romeo and Juliet. But there is no such thing as KILLING for love. "I need to posses and control [i.e., toxic behavior mistaken for love], so I'm going to kill you to prove it. Because if I can't have, possess or control you, no one else will either." People are not possessions.
The younger Mr. Lake's actions should sound familiar - because that was what OJ Simpson did too. The only difference is that OJ's narcissism is so great that he couldn't pull the trigger on himself, and instead made a run for it. I'd be interested to hear what your opinion was of THAT case during it's time, especially when he was acquitted (which does not mean he was innocent - it means he was found not guilty).
And to be frank, if you've never felt the pain of an innocent loved one brutally murdered, it's really not your place to tell others how they should think or feel. The family of Mrs. Lake may not be able to "leave it to God", which in my opinion, is an inappropriate over-simplification. The general public is always going to have their opinions whether we like it or not. I have my opinion, you have yours, and others have theirs. We may not agree, and that's OK. But one should not try to dictate how people should think or feel.
Please know, I'm not here to criticize you. I just feel that by going to the press, and by making every excuse in the book to the general public, Mr. Lake opened that door himself. Thus, the general public should be allowed to respond. The senior Mr. Lake's own line of thinking is extremely misguided. HE needs help for even thinking there can be a reasonable argument made to justify his son's actions. Toxic love is not real love. Real love does not try to possess or control. Those are just the facts.
As the great Neil Young said "You lose your love when you say the word 'mine'".