What is your advice for students of knowledge in Europe, where they respond to one another and boycott one another?

Question:
Honorable Shaykh, may Allah grant you success. This questioner from Europe says: What is your advice for the students of knowledge there and the callers to Allah who boycott one another and respond to one another without evidence or proof?

Answer:
This is not permissible. As long as they are callers to Allah and students of knowledge, it is not permissible for them to boycott one another. People do not accept anything from them unless they heal their own wounds, yet they are hostile and cutting ties with one another. The disbelievers do not accept anything from them. The brothers must cooperate, support one another, point out errors among themselves, and advise one another. Yes, and they must not display their differences before the disbelievers, because the disbelievers will mock them and will not accept their call. Yes.