What a load of egotistical, elitist garbage! A faith community/ecclesia has the provenance and historicity of the early faith communities as long as they hold to the tenets of the Christian faith as spelled out for us in the word of God. For modern-day Roman Catholics to claim sole ownership of the ancient witnesses of the faith is as absurd as their assertion to BE the one, true Church of Jesus Christ by which ALL "must pass as through a door". In fact, such boastful claims totally ignore that the Roman Catholic church of today simply cannot trace back many of her dogmas to the first century churches and loses constancy to the "believed everywhere, always and by all" standard that defined orthodox Christianity. I can trace my beliefs all the way back to the first century and would feel right at home among the believers of ANY of the Apostles' established assemblies and am confident they would welcome me with open arms. We'll share eternity together in heaven - better get used to it.
It's scriptural:
Luke 18:9-14