Complete Edition of Fr. Paul Kramer's book Heretic Pope? to be Published Soon. Here is a direct link to an Earlier Edition of this Critical and Definitive Refutation of Salza and Siscoe. And Remember, Fr. Nicholas Gruner was Going to be a Co-Author If He had lived to See this Day.
The sin of Heresy per se, like apostasy and schism, has the intrinsic effect of separating the heretic from the Church by itself, without any ecclesiastical censure or judgment; and is distinguished from other sins which do not by their very nature, separate the sinner from the body of the Church; and who, therefore, for grave offenses can only be separated from the Church by a sentence of excommunication incurred or inflicted by legitimate ecclesiastical authority. This is the infallible teaching of the universal magisterium of the Church which must be believed de fide divina et Catholica under pain of heresy, as is proven and demonstrated below.
St. Pius V teaches in the Roman Catechism: "Heretics and schismatics are excluded from the Church, because they have defected (desciverunt) from her and belong to her only as deserters belong to the army from which they have deserted."; whereas those who have not left the Church by defecting, but are excluded from the Church by excommunication, are "cut off by her sentence from the number of her children and belong not to her communion until they repent.”