How to respond if Muhammad is insulted
One needs to put in perspective that compared to God Almighty, Muhammad (or any other human being) is insignificant. So what does Quran say when God is ridiculed or insulted. Quran tells us to DISREGARD:
[7:180] To GOD belongs the most beautiful names; call upon Him therewith, and DISREGARD those who distort His names. They will be requited for their sins.
What do we do when the Prophet of God is insulted?
Quran tells us to DISREGARD:
Hadith & Sunna: Fabrications by the Prophet's Enemies [6:112] We have permitted the enemies of every prophet―human and jinn devils―to inspire in each other fancy words, in order to deceive. Had your Lord willed, they would not have done it. You shall DISREGARD them and their fabrications.
What do we do if WE are insulted?
Quran tells us to DISREGARD: [Quran 33:48] Do not obey the disbelievers and the hypocrites, DISREGARD their INSULTS, and put your trust in GOD; GOD suffices as an advocate. [7:199] You shall resort to pardon, ADVOCATE TOLERANCE, AND DISREGARD the ignorant.
Furthermore Quran tells us: [Quran 25:63] The worshipers of the Most Gracious are those who TREAD the earth gently, and when the IGNORANT speak to them, they only utter PEACE.
God on the other hand tells us to counter evil with good.
Twice the Reward for Christians & Jews Who Recognize the Truth [28:54] To these we grant twice the reward, because they steadfastly persevere. They COUNTER EVIL WORKS WITH GOOD WORKS, and from our provisions to them, they give.
So people who kill in the name of religion fall on which category?
GOD calls them in corruptors ,
Appearances May Be Deceiving [2:204] Among the people, one may impress you with his utterances concerning this life, and may even call upon GOD to witness his innermost thoughts, while he is a MOST ARDENT opponent.
[2:205] As soon as he leaves, he roams the earth corruptingly, DESTROYING PROPERTIES and LIVES. GOD does not love corruption.
[2:206] When he is told, "Observe GOD," he becomes arrogantly indignant. Consequently, his only destiny is Hell; what a miserable abode.
It is clear from these verses of Quran that the actions of traditional Muslim is exactly opposite to what God says in the Quran and no wonder why they are quite often referred as terrorists. It’s amazing that we do not hear such things from the leaders of the Islamic world it is but obvious they do not honour Quran.