Do the people of innovation who are declared disbelievers come out of the Fire?

Question : The people of innovation who commit major sins, meaning those who commit many innovations, do they come out?

Answer : Shaykh al-Islam (may Allah have mercy on him) said that an innovation may be one that entails disbelief, and that its practitioners are called disbelievers. However, a specific individual is not declared a disbeliever. He cited texts from Imam Ahmad (may Allah have mercy on him) regarding this, and said that some of these innovators who hold to an innovation that entails disbelief do not intend to oppose Allah and His Messenger, but they erred in it. Therefore, the matter of declaring someone a disbeliever is difficult, and one should not rush into anything. The one who claims to be a Muslim is, by default, a Muslim; this is the default. One cannot remove him from this claim except with proof from Allah the Exalted, so that we are safe and others are safe. As for rushing into declaring someone a disbeliever without a person looking at what he holds onto.
In the case of this man who committed an act that entails disbelief, this is an error. This is what caused the Khawarij to rebel against the rulers; they declared them disbelievers for something that came from their independent legal reasoning, for which they are not declared disbelievers, and yet they declared them disbelievers and considered their blood and wealth lawful.