How can someone claim to be a Christian and bear false against another and lie against another without repentance?

Lest we forget, I am sorry is not repentance.

And repentance is not complete without restitution.

If you have sinned, you must acknowledge your sin(s) and confess and ask for forgiveness and repent.

If you committed fornication, you must accept that you have sinned and you were guilty and ask for forgiveness and repent by not doing it again.

If you are a habitual fornicator or other kind of sinner and you don't repent, that means you don't fear God and what you sow you shall reap.

You cannot confess and profess to love God, but you hate your brother, sister or friend.
God says such a person is a liar.

Tell someone the bitter truth is better than flattering and compromise.

Read the book Romans and Corinthians.

To fully understand the mystery of our faith, read John 1.

God cannot be mocked.

Yea, that is how it should be. Nowadays, its no more. Christians call themselves 'born again' and see themselves as not liable for any sin committed. In fact they claim they cannot sin, even when they do. End time deception of the devil, destroying people's conscience, blinding them to reality and heading them to hell, just because of a phrase, born again.