I brought this up on another thread once but would like to hear more opinions, this quote from Lefebvre, is it not heretical?
Against the Heresies, by Archbishop Marcel Lefebvre:
1. Page 216: “Evidently, certain distinctions must be made. Souls can be saved in a religion other than the Catholic religion (Protestantism, Islam, Buddhism, etc.), but not by this religion. There may be souls who, not knowing Our Lord, have by the grace of the good Lord, good interior dispositions, who submit to God...But some of these persons make an act of love which implicitly is equivalent to baptism of desire. It is uniquely by this means that they are able to be saved.”