Christians are into this, absolutely. Tell a Christian about a behavior that needs repenting and they can say - it is between me and God. Or maybe they need to stop treating their relations badly and they can say - it is between me and my wife.
What does it imply when someone says "it is between me and ___"? It means, bugger off, you are not involve here, it is none of your business and so shut up. There are incidences that this is true, indeed it may be none of our business. But if this individualism is allowed to stand, society will turn to anarchy. Individualism breeds anarchy, actually, it also builds confusion.
I tell you why individualism does not work, even on a human level. Let us assume that someone just killed or murdered somebody. If we respect individualism, the criminal can say -- bugger off, it is between me and him (the victim). I want to know what the police might say or do to such a person who is guilty of that offense? Will they say - "right, it is none of our business, off you go"?
A decent society, if it is still decent that is, will not accept, the philosophy - it is none of your business. The police intrudes and prosecutes. It is not the relations of the victim that does this prosecuting, it is the police. Decent societies do not allow you to say -- it is none of your business. No, rather, decent societies make injustice and oppression their business.
9 Then the LORD said to Cain, “Where is Abel your brother?” He said, “I do not
know. Am I my brother’s keeper ?