Let us put an end to this rhetoric shall we?
IV. GRAVITY OF THE SIN OF HERESY
Heresy is a sin because of its nature it is destructive of the virtue of Christian faith. Its malice is to be measured therefore by the excellence of the good gift of which it deprives the soul. Now faith is the most precious possession of man, the root of his supernatural life, the pledge of his eternal salvation.
Privation of faith is therefore the greatest evil, and deliberate rejection of faith is the greatest sin. St. Thomas (II-II, Q. x, a. 3) arrives at the same conclusion thus: "All sin is an aversion from God. A sin, therefore, is the greater the more it separates man from God. But infidelity does this more than any other sin, for the infidel
(unbeliever) is without the true knowledge of God: his false knowledge does not bring him help, for what he opines is not God: manifestly, then, the sin of unbelief
( infidelitas) is the greatest sin in the whole range of perversity."*** And he adds:*** "Although the Gentiles err in more things than the Jews, and although the Jews are farther removed from true faith than heretics, yet the unbelief of the Jews is a more grievous sin than that of the Gentiles, because they corrupt the Gospel itself after having adopted and professed the same. . . .
It is a more serious sin not to perform what one has promised than not to perform what one has not promised." It cannot be pleaded in attenuation of the guilt of heresy that heretics do not deny the faith which to them appears necessary to salvation, but only such articles as they consider not to belong to the original deposit. In answer it suffices to remark that
two of the most evident truths of the depositum fidei are the unity of the Church and the institution of a teaching authority to maintain that unity. That unity exists in the Catholic Church, and is preserved by the function of her teaching body: these are two facts which anyone can verify for himself. In the constitution of the Church there is no room for private judgment sorting essentials from non-essentials: any such selection disturbs the unity, and challenges the Divine authority, of the Church; it strikes at the very source of faith.
The guilt of heresy is measured not so much by its subject-matter as by its formal principle, which is the same in all heresies: revolt against a Divinely constituted authority. *
(The Catholic Encyclopedia, Volume VII. Published 1910. New York: Robert Appleton Company. Nihil Obstat, June 1, 1910. Remy Lafort, S.T.D., Censor. Imprimatur. +John Cardinal Farley, Archbishop of New York)*
newadvent.org/cathen/07256b.htm
To Summarize:
-Heresy is a sin because of its nature it is destructive of the virtue of Christian faith.
-Privation of faith is therefore the greatest evil, and deliberate rejection of faith is the greatest sin.
-St. Thomas (II-II, Q. x, a. 3) arrives at the same conclusion thus: "All sin is an aversion from God. A sin, therefore, is the greater the more it separates man from God.
-The guilt of heresy is measured not so much by its subject-matter as by its formal principle, which is the same in all heresies: revolt against a Divinely constituted authority.
To be Sede Vacante or not To be Sede Vacante is ‘NOT’ the Question, Heresy is any shape or form is not good but ultimately evil.