At the time the Gaza greenhouses were destroyed, the destruction was described as the Gazans hating the Israelis so much they refused to accept this “gift”.
I read that the surface of the Pyramids was cut up to use as building blocks for Cairo. Perhaps some was also crushed for cement.
Djejefre (son and successor of Khufu) had his pyramid begun at Abu Roash. Left unfinished at his untimely death, it was carted off for construction during the middle ages and into early modern times. And the limestone facing blocks, which were carved with hieroglyphs during Herodotus’ time, were stripped after the muzzie infestation began. The attempt to dismantle the Giza pyramids began with Menkaure, the third and by far the smallest of the three large pyramids there. Work went on on for months, leaving an obvious scar. The estimate of time it would take to finish it was daunting, so the demolition work was abandoned.