As Christians who believe in the Bible, of course we think the events of the Bible happened just as the Bible records them.
I cannot speak for all old earth believers, but generally, we accept a literal reading of Genesis, and the existence of the Garden of Eden, the Flood of Noah (local, but universal in effect), and the story of the Tower of Babel, and others that we need not consider.
Yet these people do not believe in a worldwide or global flood.
Both of these groups—those who totally deny the historicity of Noah and the Flood and those who accept parts of the story—are persuaded in their disbelief by the way they interpret modern science.
As a result of this action, God "confused" their "language".