Maggie said all babies adopted suffer primal screams because they're separated from their natural mothers. But she can't explain those accidentally swapped at birth. Do they suffer primal screams? Or babies that lose their mothers in childbirth, natural disasters, wars, famines, illness followed by death, accidents. Do all these babies suffer primal screams?
Of course they do, any baby who is born prematurely and put in an incubator or a baby removed from its mother temporarily or permanently will suffer the same wound which cannot be healed even if the mother returns to the child. The loss and the wound it causes cannot be healed because the intimate relationship of the dependant baby who is still as much a part of their natural mother as when they were in the womb cannot heal the part which has been lost, the part which suddenly just disappeared. The connection is severed and the severing causes the wound which will always remain.
How much of a problem that becomes depends on the future development of the baby, if they are able to deeply bond with their alternative permanent carer if they have one and their life experiences.
A child can grow up well adjusted in a happy loving family but an incident which is beyond their control can trigger the dormant pain of the wound.
Of course we all have experiences in childhood and adulthood which leave lasting psychological effects but the reason for this discussion is to show that Jeremy Bamber will have suffered severely from separation from his mother even if he wasn't aware of it. Further separations and feelings of rejection would have been difficult for him to cope with on some level, even if he wasn't aware of it.
Sheila appeared to display her difficulties via illness, erratic behaviour and voicing her inability to bond with her mother.
Jeremy appears to have struggled in his own way but being a young man educated in a public school and growing up in the same atmosphere at home ie. 'Boys don't cry' , a 'stiff upper lip', 'take it on the chin' etc. He would have had little outlet for his struggles with pain and loss which he probably didn't understand, which in turn MAY have lead to him releasing all his anger and pain in one night.
On the other hand it MAY have nothing to do with the murders, it is just a theory and I know that doesn't make it fact.