They’re hiding the manifesto. If it had been a white mags guy the nytimes would have it on the front page.
I’m guessing they’d hide it forever if they could, but since they can’t they’re waiting for everybody to forget and move on to the next story so they can quietly dump it out in some nearly inaccessible corner of the net.
We haven’t been even told the size of the journals as far as I recall. A regular journal or even composition notebook has a lot of pages. If she has been writing something only once, or even a two or three times a day, that covers a long period of time. Those writings should show evidence of her mental illness and what and who influenced her on her path to commit such a horrible act. If it was her Christian parents, that information would have already been released.