Ok…? So you can ignore the entire old testament?

So is the Bible not God’s word then? Or only parts of it are? Who gets to decide which parts?

If there are parts in our current Bible that were included erroneously, then how can you know that others weren’t as well? How can you know that there aren’t other books that should have been included, but weren’t? Lots of gnostic gospels with some interesting stories, who gets to determine which ones are “real”?