Look right now i am in saudi arab , and especially in holy city Madinah, here we have lots of old mosques and old places, and old gravyards, but during hajj there is lot of rush, so the governemnt has destroyed all the old huts, even the huts of our prophet (SAW), and others good messengers just to serve the people , so that they dont get any trouble during hajj, they vacate all old signs of islam, they dont mind destroying it, many big bridges have bbeen made after destroying old mosques, so if it is in the interst of peopls safety, it should be demolish,