>>17787012
If you're only bringing it to the level of historical fact then there's no problem. That's a very shallow requirement which doesn't matter one way or the other.
If you take the OT quite seriously at many levels and thus want to maintain it in the present then Christianity doesn't work.
A third approach is to retroactively assign the OT as prophesy for the NT. You only care about the history inasmuch as it proves Christianity.