This video of the material actually being dumped shows what are undoubtedly carved stones.
The Israeli government is clearly giving the Waqf a wide berth to destroy any vestiges of Jewish history on the Temple Mount, apparently to avoid trouble. This is dangerously shortsighted.
The most valuable artifacts in the world are being wantonly destroyed by racists and Israel, which is supposed to guard Jewish heritage, is looking the other way.
I know - we can ask UNESCO to intervene! That's their job, right? They wouldn't stand by while priceless cultural and religious artifacts are being destroyed, would they?
(h/t Yoel and Yisrael Medad)