Keep in mind that although we know a lot about the relationship between JW and HR we don't know a lot about the marriage or breakup of GW4 and his wife. By the time of the divorce GW4 may have been ready to get rid of his wife and move on with his life.
But we know that JW was not. He was obsessed with HR and trying to get her to come back to him.
Keep in mind that although these murders was about child custody there were other factors involved. Like JW's need for revenge because HR dumped him and moved on to the point of having another man's child (I think JW knew good and well that little K did not belong to him). She even had another boyfriend that she was by all accounts talking marriage with.
It has been stated that BW and CR1 were best friends and close business partners. We don't know how well the W's knew the other girl's family or how close of a relationship her parents had with the W's. We don't know whether CR1 had something on BW that he threatened to go to LE with if they pursued custody.
Then there is the issue of Clarence R and his past. If BW was besties with CR1 he certainly knew about Clarence and what went on there.
I have a feeling that "baby Jake" was the driving force behind these murders. That he had an overwhelming need to hurt HR because she dumped him. And I think he pounded into his parents (especially AW's) head that "Like father like son" scenario of Clarence and CR1 and maybe even FR and CR2. I think it is a possibility that BW may even have told CR1 their fears as far as that was concerned and threatened to use it to get custody of SW if HR did not sign over her rights. I think in return CR1 threatened to tell LE or use in court against them what he knew about them.
I suspect that "baby Jake" manipulated his parents and brother by pounding on that issue of Clarence and how HR wronged him and hurt him until the W's entered the "mob mentality" and decided to kill them all. Remember that custody document 6 days after the murders where "poor baby Jake" was just a hard working man out there trying to provide for his family and "mean HR" just up and left him for no reason just because he "Worked too much". It was all HR's fault. I think this is the very same line he fed his parents and brother until he had them fired up enough to go wipe out an entire family. He even sucked in both of his grandmothers and maybe even his grandfathers.
JMO
That is such an interesting theory.
Two questions. 1. Did we ever find out who Clarence R's victims were and 2. How do we know JW was trying to get back with HR? Was there some reporting on that?