If one has to explain why good manners and polite behavior are desirable, our society is in real trouble.
If one hides behind good manners and polite behavior, we get political correctness - which is a foul miasma of vapid lispings which HAS placed our society in REAL trouble.
Society ???
Pleasing society ???
Grasshopper, Christianity is about pleasing God, not man...
Am I now trying to win the approval of men, or of God? Or am I trying to please men? If I were still trying to please men, I would not be a servant of Christ. Galations 1:10
But without faith it is impossible to please Him: for he that comes to God must believe that He is, and that He is a rewarder of them that diligently seek Him. Hebrews 11:6