Is it permissible to use the phrase "so-and-so is perished" for someone who died while persisting in a sin that is well-known among the people?

Question:
May Allah reward you, Honorable Shaykh. This questioner says: If a man from among the people of sins dies while persisting in a sin, and he is well-known among the people for this sin, such as the case of the people of singing and acting, is it permissible to use this phrase for them, "so-and-so is perished"? And is this the methodology of the people of the Sunnah and the community, that when someone dies while persisting in a major sin, they conclude that he is perished?

Answer:
This is not appropriate. The people of sins are prayed over and supplicated for, because they are Muslims. One seeks forgiveness for them, because they are Muslims. They did not follow the people of sins [in their specific innovation], so it is not permissible to say that he is perished or that he is in the Fire or the like of that. What is more severe than that is declaring someone a disbeliever. This is the position of the Khawarij. Rather, one seeks forgiveness for him, supplicates for him, prays over him, and treats him as a Muslim in the dealings of Muslims, because he is a Muslim. His affair is with Allah regarding the sin he committed. His affair is with Allah; if Allah wills, He will forgive him, and if He wills, He will punish him. As for his ruling among the Muslims, he is a Muslim, and he is treated with the treatment of Muslims.