Anyone who has walked through the Old City in Jerusalem, or the Israel Museum, or really anywhere in Israel knows that this is nonsense. There are Islamic finds preserved all over the place, including near the holiest Jewish sites.
Now, Haaretz has an article about a cache of gold coins from the Fatimid era that has been found in Caesarea, but it also mentions how Israel is now the epicenter of Islamic archaeology:
The Caesarea hoard displayed at the Israel Museum is one of many discovered in Israel in recent years. In Tiberias a cache of no less than 700 rare bronze tools, and 81 coins from the 9th to 11th centuries was discovered. On the seabed by Caesarea other archaeologists found a hoard of 2,000 gold coins from the 11th century. In Apollonia, just north of Tel Aviv, a cache of 400 Byzantine coins was found: 108 gold coins, 200 Samarian lamps, gold coins and jewelry.At a construction site in Yavne, builders came across 425 coins made of solid 24-carat gold from the Abbasid period, about 1,100 years ago....In Ramle, by the White Tower, archaeologists discovered 376 gold coins more than 1,000 years old, weighing 1.6 kilograms. ...[During the] discovery of the Tiberias hoard ..., the archaeologists uncovered a neighborhood from the Abbasid-Fatimid period (ninth to 11th centuries). And then: in a back room they found a huge pithos, a large clay storage container.“We were astounded at what we found. We sat all night long, three archaeologists, and counted the amazing contents,” Gutfeld tells: more than 330 bronze lamps; games; musical instruments and cooking gear. All were beautifully decorated.”The pithos also contained 42 candlesticks of the highest quality of manufacture. “We knew already that there’s one such candlestick in a museum in Kuwait and they’re very proud of it. Imagine what we felt when we found 42 of them,” he says. “That same night we realized that we had found the largest Islamic metal hoard in the world. Suddenly you see proof that Tiberias was a commercial power 1,000 years ago – an important commercial center in the span from Afghanistan in the east to Morocco in the west.”
This new cache is being displayed at the Israel Museum - again showing that if Israel is trying to hide Islamic treasures and history, it is doing a very poor job of it.