Almost everyone reads different Bibles. I don't mean different translations, I mean different Bibles.
Specifically, most people have very different and even contradictory systems of how to understand the Bible. These contradictory systems have resulted in their reading what amounts to contradictory Bibles, even though in many cases their Bibles are indeed the same translation containing the exact same words.
That leads to completely different and contradictory concepts of God, of Christ, of man, of sin and of what can be done about sin. Which, in turn, has also led to thousands of splits and sects within all major church groups (none are immune).
Did God author this confusion? No.
Who do you think did?
And what do you think God wants us to do about it?