RR Reno
I’m sure Pius XII would have denied that signing a Concordat with Hitler’s Germany meant he approved of Nazism. But it conferred legitimacy and dramatically undercut any basis within the Church for resistance. The same goes for the concordat many Catholic institutions are signing with gay marriage. It confers legitimacy on the sexual revolution and undercuts resistance.
http://www.firstthings.com/web-exclusives/2014/11/catholic-capitulation-on-marriage