Ok, let's start here. How do you define sin?
Here is my definition:
So sin is something that is done without faith. That being the case, can an Unbeliever ever do anything by faith?
But there are actions done by the unsaved that are not sinful.
Not according to Ro 14:23.
This, then, is where we are stuck. The unsaved person has just as much freedom, actual freedom, to choose good ro bad as the saved person does. But one has his will bent toward evil, the other toward goodness.
I'll grant the part of your argument that says the freedom is there. What I would say is that the will to do good, by God's standard, is not there in the Unbeliever.
And he that doubteth is damned if he eat, because he eateth not of faith: for whatsoever is not of faith is sin. - Roamns 14:23
So sin is something that is done without faith. That being the case, can an Unbeliever ever do anything by faith?
You are reading this out of context to be a general statement, when it isn't.
Paul is speaking about who can and can not eat certain foods, what is sinful and what is not. What he is saying is that a Christian should not disturb another's conscience. If a guy thinks eating X is sinful, then leave him be.
He's saying if you force the guy to eat pork and he has doubts, then you are making him condemn himself by his doubts. One must live out ones faith. To not do so is sinful.
That's all. And if you have faith, even one that is different about foodstuffs, if you introduce disharmony and doubt you are nto acting in good faith. So it is sin.
You demonstrate the very worst in taking a quote out of context and trying to make it into a universal. The Scriptures should be read in context.
It's a good clue that a verse is being cherrypicked when it begins with an "And" and yet we are supposed to act as if it stands on its own.
SD