My own thinking is that these people would be considered heretics due to their public statements regarding disbelief of a Catholic doctrine. As such (heretics), they would be excommunicated latae sententia and would therefore be outside the Church. Am I wrong?
I’ll have to look through some canon law about the excommunication, but, yes, it is at least a heretical way of thinking, no different than Catholics deciding that in “their opinion” abortion is okay, or homosexual marriage, or the inevitable nature of fornication among our youth and single persons.
I am working very hard at shedding personal opinion in an exercise of humility, and subjection to the Church on faith and morals. I found personal opinion of mortal sin to be of very little use in my life, and also to be a temptation to judgement of others. There are a great deal of Catholics out and about who have strong opinions which are formed by the culture rather than the Church, and they have decided to allow themselves the extraordinarily presumptuous and dangerous luxury of placing themselves in the Chair of St. Peter, without benefit of election by the college of Cardinals, and placing their own ill formed, badly cathecised ideas above those of the Bishops, Doctors, Apostles, and Saints of the Church, and often ahead of those ideas taught by our blessed Lord Himself. I have been among this crew, and but for the grace of God, would still have that inclination.
According to the Church, guided by the Holy Spirit, and waiting as the bride of Christ, (not to mention Jesus, St. Paul, the balance of the Apostles, and Saints, Doctors, Martyrs and Bishops of The Church, the practice of fornication, (sexual union between unmarried persons), is sinful in to a mortal degree, bringing about a break in the integrity of one’s relationship with God. If unrepented of before death, it could therefore lead to the loss of one’s soul to the unquenchable fire, for eternity. There are a lot of factors involved. There is concupisence, conscience, complicity with evil, intent, spite etc., but at a minimum we know that it is grave matter to be avoided, and if someone believes that it is a good thing, then there is a major break with the reality of the Church teaching, which is God’s teaching. Will the person go to hell? That is known only to the Father. Too many factors involved for us mere mortals to speculate. Is it worth the risk in order to indulge in what many consider an earthly “pleasure”? Not to me. Not anymore. I didn’t always feel that way, and I’ve only been a believing member of the Church for about 6 years (Buddhist convert), but once somebody knows the truth, felt true contrition, repented of their past, and recognizes the sinful nature of this, or any other such act, then it seems they are on the hook for it. You must not only try to refrain from performance of such an act, but avoid the near occasion of the act, and therefore stay away from lines of thought, and different psychological triggers which may cause you unbearable temptation. Only you know your own conscience and what these triggers may be in your case.
But certainly, it is not healthy to espouse an opinion of sexual morality in variance to the spiritual men and women for have formed the body of Christ in the communion of Saints over the centuries. And yes, whether or not canon law is specific, a person is cordoning off a section of their heart, and at least symbolically excommunicating themselves by their blatant and willful lack of submission, and the deeply troublesome act of pride which makes them feel empowered to hold such immoral “opinions” over those of the Church to which they claim unity with.
If one is universally Christian, (Catholic), and in submission to the magesterium of the Church, they simply don’t hold the opinion that fornication is okay.
I pray for those who are deluded into thinking otherwise, as I myself have been, much of my life.
Please pray for me as well,
My God bless, and lift us all into his merciful arms,
Steven