Born Again Christians need the Bible to be the inerrant word of God, and they need to take it as literally as possible. But they still interpret some verses in a way to point to Jesus and even a trinity.
But this thread was started by a Baha'i. Baha'is don't need the Bible nor want the Bible to be literally true. That doesn't work at all for them. So, Baha'is have a bunch of symbolic interpretation to make some of the Bible stories fit into the Baha'i beliefs. But they still are dependent on some things being literally true. The main ones being that God is real and their prophet was sent by that God. And anything he said is literally true.
So, both of them have unprovable beliefs at their foundation. The big one being God is real. So, they both take it on "faith". They both believe that their foundation, that they have taken on faith, is rock solid. And they both proceed from there to tell people what they must do to be saved or what they must do to build a peaceful world.
Both of them "know" that their God is real. And I'm sure they feel him in their hearts and minds. They can read their Scriptures and think that such things can only come from an almighty and all knowing God... But each believes in a different version of God.
With such a weak foundation... could it all be in their minds? But again, they tell me, "no"... they "know" it's true... God is real.
And of course it is the doubters and skeptics that are wrong.