Foreign Supermarket why from the "altar" fall into "mortal"?

From the beginning of this year caused by the retail giant Carrefour "price tag door" to Wal-Mart recently caught the "pork door" foreign supermarkets in the minds of Chinese consumers "superior" image was completely destroyed. And many people in the industry have said, has been enjoying "super-national" treatment of foreign supermarkets who are from the "altar" fall into "mortal", ...Foreign Supermarket why from the "altar" fall into "mortal"?