Well I disagree. I don't know that cases like the one here are so terribly rare. Certainly men killing their partners is not a rare anomaly, I believe the figure is 2 a week in the UK. In one of the articles I linked to, it says that there are 10 murder suicides a week in the US, although it does not specify how many of those involve men murdering their partners and or family.
Certainly there appears to be a profile of the sort of person who commits this sort of crime.
I'm not looking at this from the view that the woman is always the victim - I'm looking at it from the view that in 95% of cases the perpetrator is male and the victims are women and children. I take this view because those are the figures I have read - are you disputing the figures?
Now what you describe as a rare anomaly, I see as an extreme on a common spectrum - that of male domestic violence. Are you disputing that killing one's spouse and children is an extreme form of domestic violence?
Do I think women and children living away from men is a solution? When I am at home with my kind DH and my safe life, I think 'no'. When I am faced with the reality of the figures of domestic violence, domestic abuse, rape, sexual assault and all other types of male violence and domination, I'm not so sure.
Certainly the current set up isn't working very well for far too many women.
Perhaps we can change things, but that would take a pretty radical overhaul of current society.
In the meantime women are being hurt and killed by men and we need to be honest about that before we will be able to do anything much about it.