If it was proven that the Old Testament manna was also something akin to dried Crape Myrtle tree bug poop, would modern Protestants be mocking the Old Testament Jews the way they are mocking these simple faithful Christians now? That whole argument is utter dependent on that first word - IF.
Let me know when that word changes from IF to AFTER.
Just last week the FRoman Catholics were thrilled about some mysterious person at a car crash. They were just sure it was a heavenly visitor. (Very Pentecostal take on it all)
Now they are trying to say bug poo is really something more Divine. (More closet Pentecostalism)
Just like the religious folk in the OT, constantly demanding signs.