Here is Speray's argument:
The Feeneyite says all of the invincibly ignorant are damned. If this is so, how is this different from Calvinism concerning Matt. 11:28 that God only provides the possibility to be saved to a certain number of people, which necessarily implies that God created part of mankind for hell?
Uhm, St. Thomas also teaches that the invincibly ignorant are damned. And he explains why it's not Calvinism [in principle, since Calvin lived later]. He states that this ignorance is in fact punishment for their other sins, and that, were there no such obstalces, God would enlighten them with the things necessary to know for salvation.
Trent dogmatically teaches that faith is necessary for salvation. It is in fact agreed by ALL Catholic theologians that explicit knowledge of at least some truths about God (I'll prescind from the debate about which ones) is necessary by necessity of means in order to have supernatural faith. Consequently, ignorance of these truths, whether vincible or invincible, renders a soul incapable of being saved. But this is not Calvinism for the reasons St. Thomas Aquinas adduces, namely, that the ignorance itself is in fact a punishment for other sins.
We'll notice again how the BoDers' zeal to promote BoD has NOTHING to do with rare case of a catechumen who dies before Baptism. It's all about getting the ignorant and non-Catholics into heaven. It's an assault on EENS. And the courageous Father Feeney called it out for what it is.