Ok just put an end to simply wrong speculation and misinterpretation. The very first Edition Vol I 1812, Vol II 1815 of the Grimms Collection was often incomplete fragmentaric in order to motivate the audience to contribute more tales., It has had very little resonance and was scarcly sold.But even thhere was defenitly no remarkeable tendency to any domination of literal atrocities, those aspect always have been only one aspect among others on the enchanted world of the fairy tales.
The most important and influencal Edition was the II. Edition from 1819 which was already explicitly called "Kinder und Hausmärchen"it was of course made by Wilhelm (and Jacob) Grimm and the Grimms themself shaped in this edition the very romantic very sentimental tendency in the understanding of Grimms Märchen and of course not the late 19th century or 20th century or what ever..

There are no Fairy Tales collected and published by the Grimms which was exclusivly restricted for adults at all. this is just completly wrong speculation. And I am sure you misunderstood profoundly what Zipes intended to outline. And what ever the collected Tale include, does not change the fact, that Grimms interest in fairy tales was notably inspired by Herders Idea of sentimental education by those very old stories, since that was already one of their dominating origin in the history of literatiure in aural tradition.
In short, William you are musician, no one expects that you must have any deeper expertise in german literature. So it is nothing wrong to admit, that you still can to learn something about a perhaps a bit superficial misunderstanding.
Still I feel that this is very interesting when it comes to discuss the musical intention this composition refers to. We have wunderful examples in the music of the 19th centuryof music likewise inspired by literature. And how the music refers to and what Ideas inspire what musical intention is of course nothing off-topic as far a composer reffers explicitly to literature and literal terms. Even if myself like to post and discuss concrete music here and make more than enough use of it as most of the users will know. I still appreaciate what makes this forum great, that we do not stop at the very technical details of sample usage, but also discuss the context a compositions refers to.