'Everyone on this Geni say Finlay/finley were not catholic.
My records and my family that are related to Finlays are all catholics'
It is certainly true that Michael and Carolyn were married in a Catholic service. But --- many of their descendants share a >7cM DNA overlap with many Protestants. And this is DNA associated with my Wright line going back through Protestant Ireland and thence into CofE County Durham and thence Staffordshire. You have to ask how that can be if they've been Catholic for all time. SOME ancestor of the Finlay family HAD to be Protestant.
The choices are limited by the dates. Samuel Wright of Ematris was born around 1711, his first wife Mary Armstrong around 1712. His second wife (Dorothy Wright) he married in 1744 - and we have a marriage record from Clogher for that. The DNA overlap of Michael Finlay's descendants includes known Armstrong DNA too, so we're looking for descendants of the first marriage. Known children include Susanna Wright (married first William Madill and second Hugh(?) McDonnell, no Catholics known among descendants); George Wright (my ancestor, married Isabella McKee, only Catholic descendant suspected became Catholic on his second marriage); Elizabeth Wright, married William Carroll in a CofI Clogher Diocese-recorded marriage, but seemingly converted to Catholicism because all their descendants have been Catholic; and Mary Wright, married first James McLain, second William Cameron, and all of their children were Protestant and emigrated to Philadelphia, with only one possibility staying behind. Last choice was Louisa Wright who married John Johnson; their children all emigrated to Philadelphia as well and didn't turn Catholic.
The only Catholics known out of this are the Carrolls. Most of those emigrated to Baltimore.
So you have two possibilities: (a) Michael Finlay is a descendant of the Catholic Carrolls. But then you need to explain the family structure and also the fact that in County Tyrone and Monaghan most of the Finlays were Protestant too. There are Clogher Diocese Finlay marriages in significant numbers. Or (b) Michael Finlay was born Protestant and became Catholic when pursuing marriage with Carolyn McCarthy.
Because of the importance of this question, I asked Ian James Finlay whether any pre-marriage evidence existed that Michael was born Catholic. All he could find was a census record not long before that marriage, which might not have even been the same Michael.
So I'm frankly not finding any evidence Michael Finlay was born Catholic, and finding a fair bit of evidence he came from a Protestant family. And that changes everything, at least to me.