All of the names by which we divide ourselves in the name of God – Christian (or any of its denominational subdivisions), Jew, Muslim, Buddhist, and so on – have no meaning in the sight of God. He doesn’t care anything about these labels. He looks at each of us as His children. Our degree of obedience has nothing to do with labels because He doesn’t command us to take or apply labels.
(By the way, God doesn’t even care about irreligious labels like agnostic or atheist. If someone is truly, say, an atheist, God knows it. That a person may wear a label to other people about this subject is an additional and irrelevant fact.)
People seem to invest a lot of energy into the religious identity which they have – whether they have it by heredity or by choice. God, on the other hand, is completely disinterested. Labels are what we say we believe; God already knows what we believe. What He cares about is righteousness. That is, He cares about the behavior our belief produces: Do we love our spouses? Do we give our employer an honest day’s work? Are we generous with the poor? These behaviors are independent of religious heredity and affiliation.
Since God doesn’t care about these labels, why should we? With regard to ourselves and to others, let us give as little attention as possible to them.