Quran 5:73 – Trinity Called Kufar?
Trinity considers three godheads, three in one and one in three. It is a self conceived assumption which is both Shirk and Kufr in the sense that not only God did not teach it but also refuting it then in the time of the revelation but the christians were not accepting it. It is kufr still for those who deny this fact in face of the arguments presented to them and they prefer to stick to an assumption which is not supported by Torah nor by Injeel which are still with them. All this assumption based in the letters of St. Paul who later came into the circle of Christianity after Jesus .