She went to this school as a child, a Christian child.
As many want to discuss her mental illness let’s keep in mind she may have ‘been saved by Grace.’ As such, she was also under a doctor’s care and on ‘medication’ for a mental illness.
Several questions come to mind.
Was she abused as a child? Is what is in that manifesto an indictment against things that happened at that Christian school? Was she so convicted by her confusion/sin or the sins of others it drove her to a breaking point? Was the ‘treatment’ she was getting from the Doctor in such conflict with her soul?
There are lots of questions. But if Christians say once saved always saved, you cannot fall from Grace. Then what are we to make of these events?
Depends on the denomination. But it certainly isn't supported by Scripture.
I say: release the manifesto. If nothing else, it may provide additional details for accessories to her crimes, or about those who helped facilitate her mental disorders.