Bishop tells TCD conference that gay rights is ‘the justice issue of our time’ ...
Clarification for those who don't read the whole thing: This is a Church of Ireland (Protestant) bishop.
... A conference discussing the religious case for marriage equality has heard there will be “a price to be paid” by the Catholic Church for its stance in relation to the upcoming referendum. ...
It's basically a permutation of the "wrong side of history" fallacy. History is just shit that happens, not a "force" that takes sides.
As for the Roman Catholic church, I think they have their long term global survival strategy down pat.
Their fortunes have been down for a while in western Europe including Ireland, but nowhere near as down as liberal Protestantism, despite the fact that people tend to agree with the Protestants on social issues. Because that's not how to perpetuate a church.
Meanwhile the Roman Catholics are getting bigger than ever globally, particularly in places where the traditional anti-gay thing is a winner.