Was the Exodus natural or supernatural, fact or fiction?

[John V]

To what end?

As already noted, to display more works. We're still talking about it thousands of years later.

I went and read the passage and it gives another reason for the final plague - it was proof that a god who was for the Israelites and against the Egyptians was behind all of this. The Israelites could have seen the other plagues as somehow having natural causes, or could have been caused by a god indifferent to Israel. Not so when death strikes all the first-born except for those who were told to put lamb's blood over their door.