“Muslims had never destroyed any kind of heritage after their historic victories in foreign countries, in contrary to what ISIS and other extremists are doing now.”

That is flatly false. There are records of literally thousands of Hindu temples that Muslim invaders destroyed in India. And remember that the Middle East and North Africa were Christian areas before the Arab conquest. Those people had churches. They aren’t there now.

“In Egypt, ‘3000 extremist fatwas’ incite destruction of churches,” by Ashraf Abd al-Hameed, Al Arabiya.net, April 1, 2017: