“I don’t think Diodorus said there were three separate instances of Israelite Exodus from Egypt.”
You must have an extraordinary fascination for what you don’t think or don’t believe.
Josephus straight out said the Trojans were Jews in his writings which sort of ratifies what Diodorus wrote. They were not alone in their contention.
That's just fabulous. Where exactly in his writings does Josephus say any such thing? You should have no problem finding it, since you're purporting to know so much about it. Same goes for Diodorus -- where is it written?