"harder" would not be the word to use.
"Reality of History" would be better.
Fictional stories written for entertainment purposes loaded with sin, does not make sense to me. The purpose is one to attach emotionally to the characters as they develop in the story, while supporting, justifying, sympathizing, with sin. A sin loaded fiction.
The Holocaust is a reality of humanity and a historical fact. I believe a child should learn of the history of this event as it is a reality of our world. Necromancy in King Arthur stories (for a small example) "used for good" paints an illusion against biblical principles. There is no point to those stories, except entertainment. Necromancy is absolutely condemned in our scriptures. Fictional representations to be entertained with seems like not only a waste of time, but the enjoyment of fantasized power of witchcraft.
The same could apply to Harry Potter. How many toys are sold because of this movie? Ask yourself honestly, would you rather watch your children with a couch load of stuffed animals playing Noah's Ark, or pretending to place a Hex curse in a magic circle on their brother?
The eyes are the lamp of the body. What we bring in obviously influences us and matters.
Not sure if I'm supposed to laugh or cry reading this. The stuff found in fictional literature that is PG rated can be found in Scriptures. Like the 10 Plagues that struck the Egyptians, the Crucifixion, Incest, sex, violence, immense battles, a Great Flood that destroyed most of animals and human beings.....etc. Sure Scripture is not entertainment, just as the works of Plato(some of which contain fictional elements to convey philosophical ideas), St Justin Martyr(Dialogue with Trypho is written ala Socratic dialogue so it is fictional) and many others were written not for entertainment purposes. This means just because something is fiction, it doesn't automatically make it a piece written to entertain. Sure enough, literature such as Sherlock Holmes and Harry Potter does give the reader entertainment but all fun and joy is not the sole purpose of literature. The emotional output, creativity, questions, morality, struggles...etc all comes into play as well.
Even then, to say that literature is bad because it is a "A sin loaded fiction" that goes against Biblical Principles doesn't mean that it is bad and we should all burn our television sets, story books, dvds...etc and proclaim the 'evils' of Literary fiction. No, it doesn't work that way. After all, people don't just derive entertainment from the violent or sinful details in a story, it is the underlying allegories, messages and struggles the author wishes to convey to the reader that counts. Take the Japanese anime series, Psycho Pass as an example. It is gruesome, it has loads of gore, it is violent but underlying this brutality is the questions that the writers of the series wishes to explore, such as Freedom, Omnipotence Paradox(explored in the Second Season) and Justice.
The Journey to the West also have plenty of unbiblical stuff and violence but it also conveys important messages such as how one have to go through hardship to attain Enlightenment(All the monsters were sent by the Buddha himself), how the underdogs can be the Hero that saves the day(Many of the main characters were banished from their original positions of prestige, except for the monk). It raises questions about why good people must go through suffering like the Book of Job. I mean if we want to interpret this in a Christian context, we can say that the author wishes to show that anyone have the capability to be Saved no matter how deep in Sin they are(this cannot apply to the Calvinist however).
The Romance of the Three Kingdoms as another example of Literary Fiction also contains the stuff, loads of the stuff you hate. But underlying all the war and betrayal that goes on, it encourages values such as loyalty, brotherhood, strategy(mostly in war but applicable in modern contexts such as Business) and creativity(for purposes of war but again, applicable in modern situations as well).
Oh, btw this, "The same could apply to Harry Potter. How many toys are sold because of this movie? Ask yourself honestly, would you rather watch your children with a couch load of stuffed animals playing Noah's Ark, or pretending to place a Hex curse in a magic circle on their brother?
" is a Fallacy.
It's basically Post hoc ergo propter hoc
since it presupposes that because of Harry Potter children are going to pretend to be magicians as a result of it. To put is simply,
Harry Potter -----> Children pretending to place curses(Amounts to the fallacy of the single cause as well)
This is also a False Attribution since not all children who watched or read Harry Potter is going to roleplay as magicians. Many of my friends read the novels as children, they never pretended to be magicians.
Generally speaking, I could go on and point out more fallacies but it is clear at this point, making that question up is a rather fallacious move.