Egypt's referendum 2012, which Islamic concept?

News from Egypt declare they are going for referendum to apply sharia (Islamic canon). Egypt has Christian and Jew population along with Muslims, they are said would be governed by Islamic law and would be treated as Dimmi ( Non-Muslim who enjoys Islamic protection). Would Christians with different sects and Holy Sees and  central churches agree to it? Would all Jews agree to it? Christians and Jews are just minorities and not micro communities in Egypt thus to accord them Dimmi status is not appropriate, there are a lot of chances of injustice be done to them on various front in future.

Also, Muslims are in majority, sounds astonishing that Muslim are treated as one group, what if in future Shia or Sufi are branded as Kafir ( Non-Muslims) on basis of a Fatwa from a particular cleric? Is there any convention about Islamic society which all major Egyptians sections agree to that which group is Muslim and which is Non-Muslim? If not then Muslim unity is just for name sake to acquire power by one powerful group and once they come into power they would brand some sect as Non-Muslims. 

Unless an Islamic convention is made agreeable to whole Egyptian Muslim society; counting Muslims as one is seed for future injustice, nepotism and turmoil. Muslims be counted on basis of sects and not as Muslims, each group be regarded as independant group like Shia, Maliki Sunni, Shafai Sunni, Ismaili, Salafi, Sufi and not temporarily as Muslims, some of which in future for sure would be branded as Kafir.

Also, since concepts of Sharia in opinion of independent Muslim sects vary and are independent in themselves as well, no reason is left to talk about or assume one national sharia. I don't think Egypt or any other Muslim majority country is ready to make national sharia practical because there is no Islamic convention agreeable to all which decides which sect is within Islam or out of Islam. Such deep hidden feelings when one acquire power appears in form of branding others as non-muslims and later doing grievous injustice to them.

Its already been seen in lot of places where people formed a national Muslim front ie: Pakistan, came into power and then the a particular sect acquired more political power and once they become powerful enough they brand others as non-Muslims and started to do injustice to them. Shias have always been victim of such tactics. Muslim world is just not ready to practice Sharia at national level.