The list of sites -- Jewish, Christian, Muslim -- reduced to rubble, by the True Believers of the Islamic Stateand by other Muslims too (such as the Qaddafy regime), here.
The world's archaeologists, the world's art historians, the world's historians, have yet to express themselves publicly on this matter. Why? What do they think will happen in Europe? Will it be different from what happened to the Buddhist and Hindu temples, temple complexes, or rock sculptures, or musem-preserved artifacts, destroyed by Muslims on the march? Will it be different from what, over many centuries, but speeded-up with the latest advances in explosive matieral, in the Middle East? Why? Will the Islam of the devout in Europe be one whit diffferent from the Islam practiced anywhere else? How would it differ? How could it differ, when the texts -- Qur'an, Hadith, Sira -- are immutable?