Disbelievers commit Sins and claim that Allah commanded Them to do so!

Mujahid said, "The idolators used to go around the House (Ka`bah) in Tawaf while naked, saying, `We perform Tawaf as our mothers gave birth to us.' The woman would cover her sexual organ with something saying, `Today, some or all of it will appear, but whatever appears from it, I do not allow it (it is not for adultery or for men to enjoy looking at!)."' Allah sent down the Ayah,

وَإِذَا فَعَلُواْ فَـحِشَةً قَالُواْ وَجَدْنَا عَلَيْهَآ ءَابَاءَنَا وَاللَّهُ أَمَرَنَا بِهَا

In the third verse (30), it was said that there are people Allah has guided right while there are others who have provided the proof of their erroneous conduct, because they have, bypassing Allah, made satans their comrades, and they presume that they are on the right path.

The sense is that the guidance of Allah Subhanahu wa Ta` ala was open to all, but they turned away from it and started following satans, then, on top of it, they were led to think that their sickness was health, and their error, guidance.