Aw hell; Family of 7 dead in apparent murder-suicide

I can fully understand the “Ugh! Bad! Smash!” instincts cases like this provoke, but shouldn’t the challenge for human reason and ingenuity be, to try and find some way to make even the slightest positive from these fortunately rare, but seemingly increasing events?

Is the only option for this 25yr old man and 20 yr old woman, to have them removed from the gene pool?