Xavier,
Souls invincibly ignorant of our religion and yet maintain the moral law, God will send the means necessary for their salvation. They will not remain in their ignorance, and furthermore they will be brought into the Church. They will cease to be what they are, the Jєω will cease to be a Jєω, the Protestant will cease to be a Protestant, etc.
I disagree. Pope Pius IX teaches that what you posted above is
"a very grave error". He teaches that these people who are ignorant of our religion have no hope because they are living in error and are alienated from the true faith. He teaches that
"such belief is certainly opposed to Catholic teaching". Souls invincibly ignorant of our religion will not maintain the moral law and will not be saved.
OTOH, the same pope teaches there is hope for
"those who are struggling with invincible ignorance about our most holy religion" - provided they live a life according to the moral law and it's precepts inscribed by God on all hearts.
The term "invincible ignorance" should be completely abandoned as it means those people who are incapable of thinking at all, such as those who are in some way brain injured.
When speaking about the salvation of souls, the term invincible ignorance should be replaced with the correct term used by Pope Pius IX;
"those who are struggling with invincible ignorance about our most holy religion".
Quoanto Conficiamur MoeroreOn Promotion of False Doctrines
Pope BI. Pius IX - 1863
7. Here, too, our beloved sons and venerable brothers, it is again necessary to mention and censure a very grave error entrapping some Catholics who believe that it is possible to arrive at eternal salvation although living in error and alienated from the true faith and Catholic unity. Such belief is certainly opposed to Catholic teaching. There are, of course,
those who are struggling with invincible ignorance about our most holy religion. Sincerely observing the natural law and its precepts inscribed by God on all hearts and ready to obey God, they live honest lives and are able to attain eternal life by the efficacious virtue of divine light and grace. Because God knows, searches and clearly understands the minds, hearts, thoughts, and nature of all, his supreme kindness and clemency do not permit anyone at all who is not guilty of deliberate sin to suffer eternal punishments.