Look Into Your Teacher's Command To Boycott
When the teacher or instructor commands with boycotting a person, doing away with him, dropping him, distancing him or the likes of that, the matter is looked into. If the person did a sin according to the legislation, he's punished according to his sin and not more than that. If he did not do a sin according to the legislation, it's not permissible to punish him with anything due to the agenda of the teacher or other than him.