Beatrycze, do you think that Greek mythology was not "censored"? To my mind, due to its often usage by Europen authors, it was changed many times: when being handed down to next generations, to match its content to later rules and morality, not to mention the fact of adding new plots by ancient people themselves. A good example of these practises is a myth about Agamemnon and his daughter Iphigenia. In the original version, Iphigenia is killed in order to bring Greek army victory in the Trojan War. Later, the myth was altered, leaving the girl alive. Though Agamemnon was willing to sacrifice her, goddess Artemis took her to make poor Iphigenia her servant in one of her temples. The cruel part was cut off, because sacrificing people to please gods wasn't a common custom any more and would have put the king in a bad light.
Besides, Greek mythology is full of bloody scenes, immoral characters (Dzeus, for instance), terrible monsters. Do you suggest that Arabian or Celtic mythology are worse? It's hard to believe.