Feivel-
OK. Let’s say you have a Jewish book about someone solving a mystery. There’s nothing inherently “jewish” about it, maybe the protagonist will scream “oy vey!” instead of “oh no!”, perhaps, but that’s the extent of it. I’m sure these books abound. Except for the names, it’s a standard, plain vanilla ol’ mystery read. It conveys no real values of any kind – the author just wanted to tell a story and make a few $$$.
Then you have, say, a Sherlock mystery. Say, “The Speckled Band” (ok, that may be a little scary for kids) – a story that contains no objectionable material, and conveys no real values at all.
Real difference?