HOW THE MUSLIM DEALS WITH PEOPLE
Narrated Aa isha [RA] who said that a man sought permission to enter upon the Messenger of Allaah [peace and blessings of Allaah be upon him], so he said : Give permission to him and what a bad son of his people (or what a bad man of his people]. Then when he entered he spoke politely to him. Aaisha [RA] said: So I said: O Messenger of Allaah , you said about him what you said and then you spoke politely to him? He said:
`O Aaisha the worst people in station before Allaah on the Day of Resurrection are those whom the people desert, or abandon, in order to save themselves from their evil speech. [ Bukahri ]
So a Muslim treats a close friend in the manner benefiting one for whom he has love and he treats the clear enemy with caution and remains on his guard and he treats the worst of people in a manner which he does not make apparent to him what he thinks of him in his heart, and so on, each one is treated in the appropriate manner. This is from the knowledge necessary for giving dawah, that he treats everyone in the manner befitting their varying inclinations and manners! It will also not be hidden that one of the best ways of cementing ties and improving relations is visiting brothers.