If Robbie George, Glendon and Chaput want to ally with humanists and Protestants also in defense of marriage, I think Fisher (and More and, what the heck, Erasmus) are beaming down their approval from around the Heavenly Throne.
No, actually it’s quite apt to invoke St John Fisher for this matter. He would not have agreed with taking part in Vatican II’s false ecumenism because prior to Vatican II it was condemned.