The inmate Jamaat at a prison (in the U.S.) had expelled a brother who was openly associating with homosexuals and there were strong indications that

Answer

Homosexuality despite the extremely grave nature of this abominable sin, is not kufr. As long as the man believes that his evil misdeed is haraam he remains a Muslim. To a greater degree is his Imaan valid when he says that he has repented. If he says that he has repented, then it is haraam to ostracize him. He has to be accepted into the Jamaat. No one has the right to prevent the repenter from being a member of the Jamaat. It is haraam to ban him from Jamaat Salaat and Ta'leem classes. Rasulullah (sallallahu alayhi wasallam) said: "The sincere repenter of sins is like one who has no sins."