I would like to wade in here as things seem to be getting out of control...couple of things.
1: I am an "uber-Catholic" (just for clarification)
I've met Uber-Catholics. They aren't usually Universalists.
2: you are misrepresenting SIM's statement, I find that comical. He stated that the Catholic Church does not "doom" anyone to Hell..very true statement, She does not/will not declare anyone as damned, that is for God alone.
Not dooming anyone to hell, but very absolutely declaring that there is salvation outside of Christianity, necessarily denying the need for Evangelizing, is very different. He even declared that Mormons are "not necessarily non-trinitarians," while at the same time damning Protestants, apparently. There is no confusion of the Catholic Church's position on the LDS.
But the scripture is in fact even clearer on this, even if individual Catholics, like Popes for instance, give contradictory views.
"The most Holy Roman Church firmly believes, professes and preaches that none of those existing outside the Catholic Church, not only pagans, but also Jews and heretics and schismatics, can have a share in life eternal; but that they will go into the eternal fire which was prepared for the devil and his angels, unless before death they are joined with Her; and that so important is the unity of this ecclesiastical body that only those remaining within this unity can profit by the sacraments of the Church unto salvation, and they alone can receive an eternal recompense for their fasts, their almsgivings, their other works of Christian piety and the duties of a Christian soldier. No one, let his almsgiving be as great as it may, no one, even if he pour out his blood for the Name of Christ, can be saved, unless he remain within the bosom and the unity of the Catholic Church." (Pope Eugene IV, the Bull Cantate Domino, 1441.)
Now, unlike most protestant church's, the Catholic Church does not teach that if you do not believe EXACTLY like her or if you are not in full communion with her, you are going to hell...that (I believe) is SIM's point.
Protestant Churches don't require total correct doctrine, just on the essentials. Here, I'll quote a Protestant Church leader on the topic:
Rom 14:1-6 Him that is weak in the faith receive ye, but not to doubtful disputations. (2) For one believeth that he may eat all things: another, who is weak, eateth herbs. (3) Let not him that eateth despise him that eateth not; and let not him which eateth not judge him that eateth: for God hath received him. (4) Who art thou that judgest another man's servant? to his own master he standeth or falleth. Yea, he shall be holden up: for God is able to make him stand. (5) One man esteemeth one day above another: another esteemeth every day alike. Let every man be fully persuaded in his own mind. (6) He that regardeth the day, regardeth it unto the Lord; and he that regardeth not the day, to the Lord he doth not regard it. He that eateth, eateth to the Lord, for he giveth God thanks; and he that eateth not, to the Lord he eateth not, and giveth God thanks.
But can anyone deny Jesus Christ, that He is in fact God, who did die for our sins and rose again, so that any who believe on Him may be saved? Can anyone be saved worshiping a "different Jesus," or believing in a Gospel that contradicts what was handed down to us by the Apostles? These are foundational issues, even if not everyone is agreed on predestination, Bible prophecy, or celebrating Holy days.
Gal_1:8 But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed.
1Jn_5:10 He that believeth on the Son of God hath the witness in himself: he that believeth not God hath made him a liar; because he believeth not the record that God gave of his Son.
2Jn_1:7 For many deceivers are entered into the world, who confess not that Jesus Christ is come in the flesh. This is a deceiver and an antichrist.
There's no room here for another Jesus in any of these quotes. Considering that every Mormon, Jehovah's Witness and Gnostic has had the opportunity to hear the Gospel, and still denied the Trinity and other essentials of Christianity, they cannot be said to deny Christ "through no fault of their own" even by your own lax definitions. It's certainly their fault if they deny the plain reading of the scripture.
This is why guys like Michael Voris, or conservative Bishops, are still bringing in Catholic Converts, whereas the Catholic Church at large is in constant defense mode to get along and, therefore, is becoming less and less relevant. While I disagree vehemently with them on many issues and consider them opponents, they attract converts because they're standing for something. There is simply nothing compelling in a religion that doesn't stand by truth claims. In the old days, the Catholics would burn to death heretics and schismatics. Now they stand with them, provided they are united against quotes like these:
Joh_3:18 He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God.