The First Amendment means "This is not a Christian nation and it never will be." This isn't a Muslim nation, a Jewish nation, a Scientologist nation, certainly not a Mormon nation, and it isn't Atheist, either. Keep your "God" out of the public government because not everyone thinks like you.
This is the separation of church and state that red state voters can't seem to understand. Your God is a sad little fairy tale that grown adults tell each other to make yourselves think that you are important to someone, somewhere. You're not important and there isn't an invisible man in the sky, so stop trying to force everyone to believe your crazy bedtime stories. You can go to whatever church that you choose, pray to whatever alien Bigfoot leprechaun in the sky that you want, but do not ever think for a second that you are going to pass a public referendum that declares your insane bedtime story as the only "official" insane bedtime story.
There's nothing in the fossil record that indicates that there was ever a talking snake, therefore the Bible is not "100% historically accurate from the living word of God". It's a fairy tale about talking snakes, half-man/half-goat human-animal hybrids living in the center of the Earth, invisible magical ghosts with wings who live in a golden palace on a cloud, and Hercules who was the only begotten son of Zeus and born of a virgin.
Why does Congress recite the pledge? Because they have to keep up the appearance that they care about what "God" had to say. It's the same as wearing some pointless American flag pin on their jackets. It doesn't actually mean anything. The truth is that they don't care about the Bible and they especially do not care at all about the teachings of Christ. If they did, they wouldn't lie to start wars. If the voters cared about Jesus' teachings, they wouldn't cheer on indiscriminate death and destruction for over ten years.