It's funny how to push your own culture into another one. Since we live in a Judeo-Christian media and we think on Jesus and God and Devil. But in Japan this just doesn't fly, so when you aim at calling something satanic in Japan is like... you need to be more specific since there are many gods in Japan and there is no concept of the devil. So calling something demonic, is like just showing your own baggage.
Is like calling someone a cannibal vampire religion, also known as catholic when they say we should eat the body of christ and drink his blood to be saved. Yet in that same culture we see Zombies and Vampires and evil entities.
Also defining satan in a christian context is very different from an akuma or an Oni in a Japanese context where there are many deamons and tricksters and devils that take on the japanese society.
So whenever someone called something satanic might have more to do with his personal issues than what it is.
RE: "Anime is Satanic"