Let’s leave Protestants out of the equation for now. There were generations of Eastern Orthodox Christians. (Are they the schismatics he is referring to?) He excludes them from salvation. He also excludes Jews, Muslims, followers of Buddha and Confucius and pagans.
In 1442 A.D, Pope Eugenius IV, 1442, at the Council of Florence, reaffirmed this truth. "It firmly believes, professes, and proclaims that those not living within the Catholic Church, not only pagans, but also Jews, and heretics and schismatics cannot become participants in eternal life, but will depart ‘into everlasting fire which was prepared for the devil and his angels’ [Matt. 25:41], unless before the end of life the same have been added to the flock…
The catechism says Eastern Orthodox Christians, Jews, Muslims, followers of Buddha and Confucius and pagans can be saved if they “seek God with a sincere heart, and, moved by grace, try in their actions to do his will as they know it through the dictates of their conscience.”
One says you have to be living within the Church to be saved. One says you don’t. There was no mention of an invisible church.