Some people cultivate ignorance the way that other people cultivate rosebushes.
Such people will also often make the same assumption about the civil law of man, doing their best to remain ever ready to plead ignorance of the law if they should happen to be arrested. And sometimes in human courts, made up of fallen human judges and fallen human jurors, people do get away with using ignorance as a defense. Then sentimentality, a fallen and perverted form of compassion, takes over and absolves the criminal, with a blithe disregard for the responsibility that all of us, except for the truly mentally defective, must accept for our own actions. Bible translation can be a tricky business, as we move from one language to another. Whosoever shall confess that Jesus is the Son of God, God dwelleth in him, and he in God.