Is shunning a smoking relative considered hatred for the sake of Allah, and is loving a well-mannered brother considered love for the sake of Allah?

A Muslim must offer mutual advice, enjoin truth, and counsel patience with wisdom, good exhortation, and gentle speech. They should also strive for love for the sake of Allah, the foundation of which is obedience to Allah, not for worldly gain. A Muslim should avoid excessive mingling with deviant individuals, especially the youth, and strive to associate with the righteous. As for shunning a disobedient person, it is of two types: shunning in the sense of abandoning forbidden acts and not attending them, and shunning in the sense of discipline to deter the disobedient person. In the latter case, the benefit must be considered. If shunning leads to repentance, it is permissible; otherwise, conciliation, advice, and supplication are more appropriate. The matter varies according to different environments. The fundamental principle is that a believer is to be befriended, even if he wrongs, and an unbeliever is to be treated as an enemy, even if he acts kindly. A person who combines both good and evil should be honored for their good and punished for their evil.