Shariah is the the LAW from heaven, it's there in all holy books from Torah, Bible to Koran, all provide the same rules, after all they came from the same source. Belive me if the law of heaven been applied by all relegion, peace will be at it's peak. But, who guarantee that we (now adays humans) are able and willing to apply the law of heaven as it is.
First refugees travelling on Hungarian bus arrive at Austrian border (Reuters)
from the article: Egyptian Islamists rally for Shariah law in Cairo