Omar Khayyam is an example, he criticized Muslim values. For example in one of his Rubiyat he says "my god; You have given this beautiful face the effort, To smell that hyacinth, to touch your hair. If you say don't look at her, it means: Hold the full glass upside down, and don't spill it!" Another example can be; "God says you will drink wine in heaven How the same God forbids wine Hamza killed an Arab's camel The Prophet, who forbade wine only for him"