Dealing with the one who, when invited to Islam, starts slandering our Prophet
الحمد لله رب العالمين والصلوة والسلام على نبينا محمد وعلى اله واصحابه اجمعين
A disbeliever has the right to know about Islam, things that will help him understand that it is the truth. It is our duty as Muslims to educate him and clear his doubts regarding Islam. However, in some cases we face people, who are not ready to listen to our call and they start slandering and blaspheming our beloved Prophet (peace and blessings be on him). Our advice to those who meet such people is as follows:
Islam has laid down principles and guidelines for doing Dawah. One of the main principles is to use a good speech and arguing with them (if the situation demands such a thing), in a manner that is best. Allah says in chapter 29, verse 46, the meaning of which can be translated as:
And argue not with the people of the Scripture (Jews and Christians), unless it be in (a way) that is better (with good Words and in good manner, inviting them to Islamic Monotheism with his Verses).
When the person who is called to Islam starts to misbehave and act arrogantly insulting any of the Signs of Allah, it is time for us to keep away from them, as Allah commands in chapter 7, verse 199, the meaning of which can be translated as:
Show Forgiveness, Enjoin what is good, and turn away from the foolish (i.e. don't Punish them)
And in chapter 25, verse 72, the meaning of which can be translated as:
And [they are] those who do not testify to falsehood, and when they pass near ill speech, they pass by with dignity.
When a person is not in a mood to listen and is behaving arrogantly, we should keep away from him since this is not a suitable time to capture his heart towards Islam. We can look for a future opportunity to invite him, but for the time-being we will keep away from him as long as he behaves in such a fashion.
وصلى الله على نبينا محمد وعلى اله واصحابه اجمعين و الحمد لله رب العالمين