Is it necessary to destroy the 1400 years of precious Islamic history?

Those who give argument that it is necessary to destroy the 1400 years of precious Islamic history for "expansion" and "prevention of Shirk" should see this. There is neither expansion here nor any shirk, still, the Masjid of hazrat Salman Farsi is being destroyed!! This is greatest of Zulm, nothing else.

This pic is from place of Ghazwa e Khandaq, where seven small Masjids stood for 1400 years belonging to seven great Sahabas. Saudi government made a new masjid on the site which is separate and can be seen in the pic on the left side. So, there is NO issue of expansion here. Also, this is a masjid and there is no issue of any "Shirk". Out of the seven Masjids, few are already destroyed and others are being locked, left without care, without electricity and being destroyed one by one!! Why on earth would they do this????? We want an explanation from those who say that it is important to destroy old structures for expansion and prevention of shirk!!

Destruction like this is being done all over Makkah and Medina, without any reason at all. If Jews were doing this, we would have gone to war against them. But alas, the leaders of the Ummah decide to stay silent as 1400 years of precious history is being systematically being wiped out. Innalillahe inna alehe Rajeoon!