The first thing that popped into my mind was this question:
Will this event unite the Christians with the Catholics?
Catholics are Christians.
Salvation,
I posted this recently on another thread and I feel it is worth reposting. A comment/warning from over 500 years ago that applies to your question:
Two excerpts from Roger Crowley’s “1453” book on the fall Constantinople:
May 27th, 1453: “Late in the afternoon the people of the city, seeking religious solace, converged for the first time in five months on the mother church of St. Sophia. The dark church which had been so conspicuously boycotted by the Orthodox faithful was filled with people, anxious, penitent, and fervent, and in the first time since the summer of 1064, in the ultimate moment of need, it seems that Catholic and Orthodox worshipped together in the city, and the 400 year old schism and the bitterness of the Crusades were put aside in a final service of intercession.”
Pope Pius, Mantua, 1459:
“We ourselves allowed Constantinople, the capital of the east, to be conquered by the Turks. And while we sit at home in ease and idleness, the arms of these barbarians are advancing to the Danube and the Sava. In the Eastern imperial city they have massacred the successor of Constantine along with his people, desecrated the temples of the Lord, sullied the noble edifice of Justinian with the hideous cult of Muhammad. They have destroyed the images of the mother of God and other saints, overturned their altars, cast the relics of the martyrs to the swine, killed the priests, dishonored women and young girls, even the virgins dedicated to the Lord, slaughtered the nobles of the city at the sultan’s banquet, carried off the image of our crucified Saviour to their camp with scorn and mockery amid cries of “That is the God of the Christians” and befouled it with mud and spittle. All this happened beneath our very eyes, but we lie in a deep sleep….Mehmer will never lay down arms except in victory or total defeat. Every victory for him a stepping-stone to another, until, after subjecting all the princes of the West, he has destroyed the Gospel of the Christ and imposed the law of his false prophet upon the whole world.