Fr. Fenton taught that Saint Robert Bellarmine was wrong in his explanation about the "Soul of the Church". He did that because he could not go against the teaching of Pius XII in Mystici Corporis a few years before his article. Then Fenton proceeded to teach the same thing in a way that could get around (as he thought) Mystici Corporis. Fr. Fenton like St. Robert Bellarmine and all those that attempted to explain how the unbaptized are "somehow" in the Church, was attempting to explain a contradiction, and he just replaced one obsolete error (the Soul of the Church theory) with another.
Anyhow, I believe that Fr. Fenton believed as St. Thomas, and rejected the teaching of the Salamances, that the unbaptized can be saved, even if they have no explicit desire to be Catholics, nor belief in the Trinity and the Incarnation.
Therefore, the point of using Fr. Fenton to teach the "within thing", is hypocricy, since you believe as the Salamances that the unbaptized can be saved, even if they have no explicit desire to be Catholics, nor belief in the Trinity and the Incarnation. You reject Fr. Fenton.
Fr. Fenton, The Catholic Church and Salvation, 1958,
page 127: “By all means the most important and the most widely employed of all the inadequate explanations of the Church’s necessity for salvation was the one that centered around a distinction between the ‘body’ and the ‘soul’ of the Catholic Church. The individual who tried to explain the dogma in this fashion generally designated the visible Church itself as the ‘body’ of the Church and applied the term ‘soul of the Church’ either to grace and the supernatural virtues or some fancied ‘invisible Church.’…there were several books and articles claiming that, while the ‘soul’ of the Church was in some way not separated from the ‘body,’ it was actually more extensive than this ‘body.’ Explanations of the Church’s necessity drawn up in terms of this distinction were at best inadequate and confusing and all too frequently infected with serious error.”
Page 173-174: “Yet, despite the perfection of St. Robert’s teaching and the clarity of his exposition, this section of the second chapter of his De ecclesia militante was destined to be a source of serious and highly unfortunate misunderstanding by subsequent theologians. The weak part of this, perhaps the most important single passage in the writings of any post Tridentine theologian, was St. Robert’s use of the terms ‘soul’ and ‘body’ with reference to the Church.”
page 179: “It is one of the ironical twists in history that St. Robert, pre-eminent among the writers of the Catholic Church for the clarity of his expression, should have offered the occasion for such serious misunderstanding.”
Page 181: “The misuse of St. Robert’s terminology went a step farther at the beginning of the eighteenth century in a well-written manual Elementa theologica written by the Sorbonne professor, Charles du Plessis d’Argentre.”