Hadhrat Mawlana Mufti Mohammad Taqi Usmani (may Allah preserve him) said,

“One should clearly distinguish between the Islamic teachings and the general practice of the Muslims. Unfortunately, we are living in an age where the vast majority of the Muslims are not aware of the noble teachings of Islam nor do they practice them in their day-to-day lives. Instead, they are mostly influenced by the different cultures in which they are/have been living. Therefore, everything the Muslims practice cannot be attributed to Islam. When one evaluates the virtues of Islam, he should not refer to the practice of the Muslims of today; rather he should turn to the principles laid down in the Holy Qur’an and Sunnah. Obviously, if the Muslims have abandoned the guidance of the Shari’ah, it cannot be seen as a defect in the Shari’ah itself. It is a defect in those who have deprived themselves of this Divine Guidance.”

From: Pearls of the Elders