Twaddle!
Isn't it interesting that we are so often told how the Muslims were the ones who preserved Greek culture for us. But when they had the Rosetta Stone sitting under the Islamic watch for over a thousand years they hadn't a clue.
This is reminiscent, to me, of Gamla. It was a place described by Josephus, but no one knew whether it really existed until after the '67 war when Israel captured the Golan Heights. And soon thereafter, archeologists discovered the place. (See 4th and 5th photos indexed at this link.) The Muslims care nothing for any history that isn't theirs.
The idea of returning the Rosetta Stone to Islamic Swine is absurd. Were it done, I have little doubt that within 20 years someone would recommend smashing it because it was a dangerous alien influence.
ML/NJ
Well before 20 years have past, Cairo and several other
mid-East cities will be glow in the dark glass parking lots.
Not a real good place to store treasures.