First of all, you know nothing about this situation other than what you read in the papers so you are in no position to judge the actions of the father who could not have known his wife would drown all their children. You can't read his mind. So to blame him with the benefit of hindsight is shallow reasoning.
Probably all murderers have inadequate brain functions to some extent or they wouldn't kill innocent people. Andrea rationalized she was helping her children by killing them. We have liberal people almost as warped in how they reason and they are not considered legally insane.
Since we can't read their minds how are we as a society to deal with murderers? The only rational way is to execute murderers and let God sort it all out.
Well, get the laws changed then.
Seems you are really super protective of the husband. Wonder why he is to have no blame, wonder why the one committing the murders is the only one who had the responsibility for those children.
Guess if a woman has a heart attack, you would expect her to still clean, care for the children and cook.
Do you say there are no mental problems in society? If so, why are the deranged in institutions? Why aren't they in the work force earning their way? If the brain can have no damage then put them all to work, let them all take care of their families, let them run the country.
Afterall, there are no disfunctioning brains, they are just using that as an excuse.