How can I make something unlawful permissible while openly committing a sin, and how can I not make it permissible?

The question is unclear, but it seems the questioner is puzzled by the fact that someone who openly commits a sin does not necessarily deem it permissible. This is correct. Openly committing a sin (al-mujaharah bi al-ma’siyah) is a major sin. However, deeming permissible something that is unanimously agreed upon as forbidden is an act of disbelief (kufr) that expels one from the fold of Islam. How many Muslims commit sins and tell their friends about them, while believing in their prohibition and feeling guilty about them, yet their wretchedness and desires overcome them.