Majority is a pretty bold statement. There are aspects without historical support, jews were most likely never Egyptian slaves and were probably a sect within the Canaanites that grew to dominance. I woild say that literal divine intervention is ahistorical, but while for sure skewed to the side of the writers, there is a solid amoimt of historical support behind the broad strokes of events in the Bible. The specifics and the god stuff isnprivsvlt made up but to say the vast majority has no historical support is absurd.