She is a mass-murderer, pure and simple, and deserves the death penalty. There are a thousand other things she could have done other than coolly and rationally murdering innocent children. There are a thousand other conclusions she could have been "driven" to, even if 1/10 of what the defense said IS true. But she selfishly, and I think brattily, chose their fate now she deserves to share it.
Some day we have to stop rewarding adults for acting like children, and it's going to be a tough lesson that a lot of folks are going to squeal loudly about and writhe shouting all sorts of blame-shifting rhetoric to try to escape from...
She's not insane, she's the epitome of the most selfish, sadistic strain of bratty "I'll eat worms then you'll be sorry" childish beahvior I've ever seen. A mass murder who deserves to die.