Islam stress muslim to behave in good manner to fellow brother.Let see its guidance
Quranic Concept of Character.
People inhabiting different countries might follow different ways of life but, according to the Holy Quran, human values are the same anywhere and unchangeable too. It is not given, however, to human intellect to determine such values. Human intellect is essentially individualistic in character. It can seek preservation of the particular self to which it belongs individually or collectively, but not that of the other selves. For the well-being and preservation of mankind as a whole, however, what is needed is not an individualistic intellect, which cannot see beyond its nose, but a comprehensive and all pervading intellect, namely God and Revelation. It is Revelation alone which gives abiding universal values. The revealed values are preserved in the Holy Quran, the code of life for mankind in all climes and ages. Quranic values are Permanent Values of life and provide a universal standard of character or, to use Quranic terminology, Taqwa.
“O believers, be you securers of justice. If you are summoned as a witness, be a witness for God regardless of your relationship with the parties, whether your evidence culminates yourself or goes against your parents and kinsmen and whether the party affected is rich or poor. God’s Law is the best protector for the rich and the poor. God stands closest to either and claims that you be true to Him in preference to every one else. Let not caprice, personal gain, demands of relationship or regard for riches swerve you from the path of justice. Also in tendering evidence, neither twist your statement nor avoid any, remembering always that God is aware of the things you do”, (4/135).
Hadith About Character
Hadrat Abu Darda, may Allah be pleased with him, relates that the Holy Prophet Muhammad, may the peace and blessings of Allah be upon him, said, “Nothing is heavier in the scales of a believer on the Day of Judgement than his good behaviour. Allah detests a person who is obscene and shameless”. (Tirmidhi)
Muslims are forgiving to others as was shown by Prophet Muhammad Sallallahu ‘alayhi wa Sallam. There was one incident when the Prophet went to Taif to preach but the people stoned him. Then the angels of the mountain came to the Prophet and asked him if they should crush the people of Taif with the mountains surrounding the valley, but the Prophet Sallallahu ‘alayhi wa Sallam said “no”, and he said that he is Rahmatul-lil-’Aalameen (mercy for all the worlds). He also said maybe those people would one day believe in Allah and have a change of heart.