And do not insult those they invoke other than Allah , lest they insult Allah in enmity without knowledge. Thus We have made pleasing to every community their deeds. Then to their Lord is their return, and He will inform them about what they used to do.
[Al Quran 6: 108]
This ayat was descended when the Muslims started saying that the worship of Idols is really very bad thing and insulted Kuffaars’ gods standing before them. They insulted Allah in return. Then Allah forbade and proscribed the Muslims to call Kuffaars’ gods corrupt in this situation just BECAUSE they in return insulted Allah.
We all know they are wrong and calling their gods wrong is correct in Islam, and it is our duty to tell them about the true religion -Islam ,but when it comes to respect of Allah you (Muslims) should avoid any “additional” religion duty and avoid advising the person who can create unstoppable trouble.
This is the lesson of this ayat 🙂