Fr Feeney never mentions St Thomas, nor invincible ignorance, nor Valentinian. You are putting words in his mouth, then objecting to his imagined words. You make no sense.
You are just ignorant of Fr. Feeney's teachings.
Baptism of water absolutely needed , p. 330 ("Reply to a Liberal", by Raymond Karam, published in , Spring, 1949-- according to page 274 of : "Father Feeney supervised and gave his final approval to 'Reply to a Liberal' by Raymond Karam. '": "The only remedy against original sin is baptism, and all those whom God predestined to salvation, He draws them to this remedy. All the children who die unbaptized and all the adults who die ignorant of baptism, or who, having been drawn to it by God's Providence, refuse it, are not predestinate, but will perish eternally".