Did the catholic church like social cred, because of its corporatist ideals?
I'm not sure, but the Creditisite and the White Berets(non-party) in Quebec certainly liked the Catholic Church.
The Pilgrims Of St. Michael
My guess would be that the more educated among the clergy saw this sorta stuff as hokey, but were happy to have the yokels voting creditiste instead of for the godless NDP or Liberals.
And at the federal level, from the 1963 schism, from wiki...
On the Saturday of the convention, Caouette had given a 90-minute speech in which he described Thompson as a “marionette” for Manning. He also dropped a bombshell: he claimed that in 1960, ten minutes before the leadership vote, Manning had instructed him to “tell your people to vote for Thompson because the West will never accept a Roman Catholic French Canadian leader”.[1]
Being from Alberta, I can imagine Manning was right that most western Socreds in the 60s would be unhappy with a Roman Catholic French Canadian leading their party. The Liberals under Louis St. Laurent had done not too badly in the west(including Alberta), but that would have been a somewhat different demographic than the kind of people who attended Social Credit conventions.