There are atheists in Saudi Arabia. Your Middle East speaks with one of them:
Jabir continues to keep up the semblance of belief in Islam when with his family. Occasionally, this becomes frustrating, especially as every Friday he has to pretend to go pray at a mosque, but in reality sits in his car outside a coffee shop chain, sipping a latte until the sermon is finished. Another atheist, Abdullah, mentions he is fortunate to have his family live in another part of Saudi Arabia, and is therefore free to have a weekly lie in.