“Aside from claiming the name, what makes them Christians???”
If a person believes that Jesus is the Son of God, that he was born of a virgin, was crucified and died, as payment for our sins, was resurrected by his Father 3 days later. If he/she repents of their sins, admits they are a sinner, and asks Jesus to come into their hearts, I believe that person is saved, and is a Christian.
I believe the Catholic Church teaches that.
The Creed: A Spiritual Treasure (and its relevance to contemporary society
The Nicene Creed [Catholic Caucus]
On the Mend: The Church in the Early 21st Century
Radio Replies Second Volume - Value of a Creed
The Nicene Creed: Ancient Symbol of the Catholic Faith [Ecumenical]
What's the Point of Creeds?
What’s the Point of Creeds?
Who Needs a Creed? (part 1 of 12)
Creed 7: Ascended Into Heaven
Beginning Catholic: Creeds: Apostles, Nicene, Athanasian [Ecumenical]
Beginning Catholic: Basic Tenets of Catholicism [Ecumenical]
The Catholic Nicene Creed
We Believe in One God...: The Nicene Creed at Mass [Catholic/Orthodox Caucus]
I Believe [Apostle's Creed]
Why the Creed Doesn't Mention the Eucharist
The Apostles' Creed in Public and Private Worship
More Than Our Father [The Creed]
The Nicene Creed in Greek and Latin
The Creed - latest revisions proposed by ICEL