Or did they still teach justification by faith alone?
We still teach faith alone.
The future will tell us one of two things.
Either this man was lying about his faith and was good at faking Christianity or he was a Christian and will one day come under such discipline and misery from his sin that he will repent.
6 If we say we have fellowship with him while we walk in darkness, we lie and do not practice the truth 1 John 1:6
Whoever says “I know him” but does not keep his commandments is a liar, and the truth is not in him 1 John 2:4
6 No one who abides in him keeps on sinning; no one who keeps on sinning has either seen him or known him. 1 John 3:6
No one who is born of God will continue to sin, because God’s seed remains in them; they cannot go on sinning, because they have been born of God 1 John 3:9
If this man keeps on sinning and doesn’t repent then that means he hasn’t seen him or known him. He hasn’t been born of God.
So the Bible tells us that if someone keeps on sinning it means they never really knew Christ. Somehow, if you have been born of God you can’t go on sinning. I don’t know how it works but that is what the Bible says. And it doesn’t just say it once, it says it twice.
Do you think it is possible to have been born of God and “keep on sinning”?
Note, this isn’t talking about an isolated sin, it is talking about a willful repeated sin that isn’t repented from.
It is amazing that if I stop speculating and go to God’s word I find the answer.