How to Deal with a Neighbor Who Causes Harm

His second question is: If there is a person who is foul-mouthed, causes much harm to his neighbors, and likes to stir up problems, and you have stopped greeting him to avoid his evil and his problems, is this permissible? Please inform us, may Allah reward you with the best reward.
Answer: This requires detailed explanation: If his harm to his neighbors is of the known kind that incurs the anger of Allah, the Exalted, and is considered a sin and a crime, then he deserves to be boycotted if he does not accept advice and does not conduct himself properly. The first obligation is to advise him, direct him to good, and warn him against harming his neighbors and transgressing against them. If he does not accept the advice, he deserves to be boycotted and not greeted until he conducts himself properly. However, if the matters are minor, or things a person might be ignorant of, or some of the issues that arise among people regarding their neighbors, these do not necessitate boycotting. But there is no harm in directing him, advising him, and guiding him to good. Greeting is a matter of great importance; it is a recommended practice (sunnah) and one of the causes of the well-being of society and the affection within the community. It is prescribed for Muslims to greet one another. The one who initiates the greeting is better, and responding to it is obligatory. But if there are clear matters that are considered causes of open sinfulness, such as major sins, then if the person does not accept the advice and does not return, he deserves to be boycotted until he repents. Yes.