For the last 1300 years + wherever Muslims have gone they have left ruins. Christian Churches, monasteries, Buddhist sanctuaries and temples, Hindus too have lost their holy structures.
They are a destructive cult, exploiting the cloak of religon to appeal to the disaffected much like the communists have been doing.
The world should have paid attention when the Taliban muslim fanatics destroyed the statue of Buddha.....they didn't and we're now paying the price.