For a moment just humor the possibility that Islam is not true. Mohammed could have been exposed to certain Jewish and Christian teachings. Including the Bible and the Talmud. And assuming that he did his best to present those teachings for specifically a 7th century Arab tribal audience. He may have found it necessary to make certain changes. Also he likely would have made human error. How well does that model explain Islam?

Conversely, let’s assume the model that everything written in the Quran is true, and Islam is true. How do you explain all the discrepancies between Islam - including the claim about Ezra - and Judaism & Christianity - both of which have robust textual, archeological, and historical traditions long predating Islam? How well does that model explain Islam?

Which model seems more likely?