Fr. Longenecker is right when he says
Large scale ecumenism with the Catholic Church is definitely over. There's no point talking with the Anglican Communion. They spit in our face every time. Furthermore, there is no way a unified body could be identified to talk with even if we wanted to. Ecumenism will now be with individuals and smaller groups. Finally, the other thing that is certain is that the fuss in Anglicanism will bring a good number of people to the banks of the Tiber, and for that we should rejoice and continue to pray.
What exactly is happening? A separation is happening, as is quite clear. What principally characterizes the two sides? The essence of the position of the 'liberal' side is what is called 'modernism', which Pascendi Dominici Gregis condemned one hundred years ago. The Catholic encyclopedia entry defines 'modernism' as "the critique of our supernatural knowledge according to the false postulates of contemporary philosophy". The fundamental error of modernism is that it raises human reason above divine revelation. Thus, its fundamental error is a form of the chief of the seven deadly sins, the one through which Satan himself fell, pride. Faith and pride are immiscible, for the former is a trust in God, and the latter is a distrust in God and a trust in oneself.
In contrast to the 'liberal' side, the essence of the position of the 'traditional' side is a subordination of human reason to divine revelation.
Those who subject divine revelation to human reason cannot be truly united to those who subject human reason to divine revelation. "For what do righteousness and wickedness have in common? Or what fellowship can light have with darkness?" (2 Cor 6:14) Hence, wherever such persons are mixed together, they will necessarily eventually separate, as oil naturally separates from water. And that is what is happening with Anglicanism.
I believe that this fundamental separation will continue to take place all over the world, as I have argued in a little essay titled "On The Imminent and Final Conflict between the City of God and the City of Man", which I wrote in April/May of last year. [Of all that I have written on this blog, I believe that that and "The Gnostic Roots of Heresy" are the two most important (insofar as anything I have written here is important), for they describe the end and the beginning, respectively, of the story of unity and disunity.] The good ecumenical news out of this Anglican split is that those who subordinate human reason to divine revelation are, in a way, now more free to pursue reconciliation and reunion with the Catholic Church. It is among those persons who subordinate human reason to divine revelation, no matter what their Christian tradition, that ecumenical activity is and will be most fruitful, for such persons have the most important thing in common, i.e. humility before God and divine revelation. That is why I hope and expect to see a continued reconciliation between traditional Anglicans and the Catholic Church.
Two related articles on the prospects of traditional Anglicans reuniting with the Catholic Church are: "Anglicans to Catholics: Ready or Not, Here we Come" and "Church of England bishops coming home to Rome?"
Let us continue to pray for "the reconstitution of the full and visible unity of all Christ's followers".
UPDATE (July 8): Two Anglican bishops seek to lead traditional Anglicans to reconciliation with the Catholic Church. (See here) Fr. Longenecker comments on this development here. Taylor Marshall comments here.