What is wrong with USA?

I wouldn't turn my back on them in a kitchen.
They're either too stupid or too evil to be unleashed on public. Another Payton being stabbed 19 times just isn't worth it. We like living in a safe country. Crimes have repercussions. Also, it would be best for you to not immigrate to America ever. Move to Pakistan, you can stab 12 yo girls there and just make up a story and get away with it.

Totally agree with you.

Tell the girl they stabbed 19 times and left in the woods to bleed to death (after planning her murder for 6 months) that they're the least dangerous criminals imaginable.

The purpose of trying them as adults is to give the judge the broadest possible range of options. Being tried in adult court doesn't necessarily mean an adult sentence in prison. There are other options, like hospitalization. If the case were forced into juvenile court, the punishment or court ordered mental treatment couldn't extend beyond 18. Their criminal record would also be sealed, which could be a huge problem if they're violently insane by then. This is a strong possibility with Morgan since schizophrenia's severity tends to peak in the late 20s/early 30s. Statistically, schizophrenics are three times more likely to commit violent crimes than the general population. The court can't ignore that.

The girls have argued that they belong in juvenile court because of their mental conditions. The judge found that they belong in adult court because the attack was "not accidental or impulsive, but premeditated and extremely violent." I can't disagree with that. The attack was horrific and their post-attack interviews are chilling in their brutality, cold-bloodedness, and complete and utter lack of remorse or regret. Even though they're clearly sick, they're also clearly dangerous and the court has to take into account the possibility that they will always be dangerous. Hence, they'll be tried in adult court so that the court's supervision of their mental state isn't halted at 18. That's all it's about. It's not about "locking them up and throwing away the key because Americans are barbarians".

Are you twelve years aswell? Because you seem to think like one.
These girls were kids. Nobody claims they should not get punishment but not as adults! They should get treatment not punishment in an adult prison. You and your likeminded are the reason why it takes twice as long time to move humanity forward.

Until they're babysitting someone's child and decide to kill the child to showoff to their peers. Then society will say why did they get a slap on the wrist.

Dropping them into a psych ward for a few years then re-inserting them into society is the worst possible "solution".

Psych wards aren't miracle factories. They can't make people un-schizophrenic. At best they can help control symptoms with tightly managed medication and therapy. Many on meds still suffer hallucinations and delusions. It never goes away. Management is the best case scenario and in the case of someone who has already acted out their delusions in hyper-violent fashion, their case could be unworkable. Morgan is on anti-psychotics and seems to be doing better but they could change anytime, especially if the court has no power to force medication compliance.

Re-insertion into society is a very difficult process for someone whose treatment has been successful bot for someone for whom it isn't? It's a nightmare and not just for them but for everyone around them. The state will be held responsible if they let them out and one or both attack someone else.