كَانُوا لَا يَتَنَاهَوْنَ عَن مُّنكَرٍ فَعَلُوهُ ۚ لَبِئْسَ مَا كَانُوا يَفْعَلُونَ (79)
(5:79) They did not forbid each other from committing the abominable deeds they committed. *102 Indeed what they did was evil.
*102). The corruption of any nation begins with that of a few individuals. If the collective conscience of that nation is alive, the pressure of public opinion keeps those persons in check and prevents the nation as a whole from becoming corrupted. But if instead of censuring such individuals, the nation leaves them free to behave corruptly, the corruption originally confined to a few continues to spread till it engulfs the whole nation. It was this which ultimately caused the degeneration of Israel. (For the curse against Israel in the words of David and Jesus see Psalms 10, 50 and Matthew 23.)