In many countries in the Middle East - and this is changing in the wake of the Arab Spring - but for a long time, censorship of books and film was a very big deal. There were books you couldn't buy; things with political content would be censored, but there were some genres of books and film that the censors just didn't understand.
In the West, anything that must be hidden is suspect; availability and honesty are interlinked. This clashes irreconcilably with Islam, where the things that are most precious, most perfect and most holy are always hidden: the Kaaba, the faces of prophets and angels, a woman's body, Heaven.