While this is all true, I don’t think it applies to the question.
If I were to hazard a guess, I would imagine that the devout believer in a false faith is looked upon more favorably than the lukewarm believer of the true faith.
The devout believer pours all that they have into their faith, they make it the center of their life. Even if that faith isn’t properly directed, it shows an inward desire to live in communion with God, and God knows our hearts and knows that that person desires Him, even if they don’t know it themselves.
On the other hand, the person who has true faith, but does nothing with it, is like the servant who buries his talent in the sand until his master returns. He does nothing with the truth that has been revealed to him, and Christ tells us quite plainly that the lukewarm will be case out.
Now, is any of this definitive? No. Ultimately, that is up to God. however, I believe the principles I’m relating are sound. Faith, even misdirected faith, shows the desire to know and to please God. A person’s culpability for their belief in a false faith is something we cannot know this side of Heaven, so we must pray for those who believe falsely, no matter how devout and well-intention-ed that faith must be. But I personally feel that the devout false believer is in better shape than the lukewarm true believer.
Of course, I am always open to correction if something I’ve said contradicts the Church ^^