I will not blame you or those who belong to your generation for asking this question because we have failed to educate our youngsters about our own history. There was no shortage of liberals or Islamophobes back in the early days of Pakistan who slammed the same question in a hope that nobody will be able to adequately answer this. However, leading Ulamaa of all schools of thought (Deobandi, Barelvi, AhleHadees, Shia) gathered at a convention held at Karachi from January 21 to 24, 1951 and agreed upon 22 points for establishing Sharia in Pakistan. By presenting these 22 mutually agreed points, the Ulema of Pakistan practically left no choice for the legislature but to work on the implementation of Islam. However, it never happened, and in all those years so much dust has blown at the issue that even literate people got confused. Following are the 22 points agreed upon by the Ulemas representing various sects of Islam:
1. ALLAH (SWT) is the REAL Sovereign and Lord of this universe.
2. The Law of the country shall be based on Quran and Sunnah and neither any law shall be enacted nor any Administrative injunction shall be laid down that is repugnant to Quran and Sunnah.
3. This country shall not be based on any geographical, racial, linguistic or any other concepts but on those principles and aims which are based on the code of life laid down by Islam.
4. It shall be the obligation of Islamic state to establish the goods defined by Quran and Sunnah, suppress the wrongs and arrange for the revival and supremacy of Islamic beliefs and for the necessary education of established Islamic sects according to their understandings of religion.
5. It shall be the obligation of Islamic state to strengthen the unity and brotherhood among all the Muslims of the world. It shall get rid of all the means that may give rise to differences among the Muslim citizens of the state due to ignorant prejudices of racism, linguistics, regionalism or any other sort of discrimination and ensure the stability of unity among the Islamic community.
6. State shall sponsor, without any religious, race or other discrimination, the basic needs such as food, clothing, shelter, health and education for all such people who cannot earn their livelihood or cannot do so temporarily due to unemployment, illness or other reasons.
7. Citizens of the country shall enjoy all the rights laid down for them in Islamic Sharia. It means protection of life, property and dignity within the Law, freedom of religion and sect, freedom to worship, freedom of caste, freedom of expression, freedom to move, freedom to gather, freedom to earn livelihood, equal opportunity to progress and right to get benefits from social organizations.
8. None of the above-mentioned rights of any citizen shall be suppressed at any time without any legitimate reason according to Islamic Law and none shall be punished for any accusation of crime without provision of an opportunity to defend and without a judicial decision.
9. The established Islamic sects shall enjoy complete religious freedom within the prescribed boundaries and Law. They shall have the right to educate their followers on their religion. The decisions related to their personal affairs shall be made according to their religious jurisprudence and it shall be suitable to make an arrangement that their own judges make such decisions.
10. The non-Muslim citizens of the state shall enjoy complete freedom, within the prescribed boundaries and Law, to practice their religion, worship, culture, religious education and they will have the right to get decisions on their personal affairs according to their religious law or traditions.
11. It shall be mandatory to abide by the agreements made, with non-Muslim citizens of the state, within the boundaries of Sharia. Both the Muslim and non-Muslim citizens shall have equal civic rights as mentioned above in clause no. 7.
12. It shall be mandatory for the President of the country to be a male Muslim whose trustworthiness, capability and decision-making enjoys the confidence of people or their elected representatives.
13. The president of the state shall be actually responsible for administering the state. However he can delegate any part of his authority to a person or an organization.
14. The government of the President shall not be autocratic but consultative. It implies that he shall execute his duties after consultation with the members of government and the elected representatives of the people.
15. The President shall have no right to govern without the help of consultation after suspending the constitution partially or completely.
16. The organization that shall elect the President shall also have the right to remove him with majority votes.
17. The President of the state shall have the same civil rights as general Muslims and shall not be immune to impeachment.
18. Same law shall be applied to the members and workers of the government and the citizens and the general courts shall implement it.
19. The judiciary shall be separate and independent from the administration so that the judiciary does not get influenced by the administration in performing its duties.
20. It shall be prohibited to preach or promote any of such thoughts and ideologies, which may be destructive to the basic principles of the Islamic state.
21. The various provinces and parts of the country shall be considered the Administrative Units of one state. Their status shall not be racial, linguistic or tribal entities but shall be of administrative territories, which may be delegated administrative authorities under the central dominion keeping in view the administrative convenience but they shall not have right to disintegrate from the centre.
22. Any interpretation of the Constitution that is against Quran and Sunnah shall not be valid.
Mind you, the Ulema who came up with these points were true scholars of Islam and were nothing like the type of political Mullah we get to see today. These people had nothing to do with religious intolerance or violence. Read the names and their affiliations to get the idea:
Allama Sayyid Suleiman Nadwi (President, Majlis-e-Haza); Maulana Sayyid Abul A’la Maududi (Ameer, Jamate-e-Islami Pakistan); Maulana Shams-ul-Haq Afghani (Minister for Education, State of Qalat); Maulana Badar Alam (Ustaaz-ul-Hadees, Tando Allah Yar, Sindh); Maulana Ihtisham-ul-Haq Thanwi (Administrator, Dar-ul-Uloom Al Islamia, Ashraf-Abad, Sindh); Maulana Muhammad Abdul Hamid Qadri, Badyouni (President, Jamiat-Ulema Pakistan); Mufti Muhammad Shafi (Member Board of Islamic Education, Constituent Assembly Pakistan); Maulana Muhammad Idris Kandhalwi (Sheikh-ul-Jamia, Jamia Abbasiya, Bahalwpur); Maulana Khair Muhammad (Administrator, Madrasa Khair-ul-Madaris, Multan city); Maulana Mufti Muhammad Hassan (Administrator, Madrasa Ashrafiya, Neela Gunbad, Lahore); Peer Sahab Muhammad Ameen-ul-Hasanaat (Manki shareef, Sarhad); Maulana Yusuf Binori (Shiekh-ul-Tafseer, Ashraf Abad, Sindh); Haji Khadim-ul-Islam Muhammad Ameen (Al Mujahid-Abad, Peshawar) Khalifa Haji Tarang Zai; Qazi Abdul Samad Sarbaazi (Qazi Qalaat, Balochistan); Maulana Athar Ali (President Jamiat-Ulema Islam, East Pakistan); Maulana Abu ja’far Muhammad Saleh (Ameer Hizbullah, East Pakistan); Maulana Raghib Hassan (Vice President Jamiat-Ulema Islam, East Pakistan); Maulana Muhammad Habib-ur-Rehman (Sarseena Shareef, East Pakistan); Maulana Muhammad Ali Jalandhri (Majlis Ihrar-e-Islam, Pakistan); Maulana Dawud Ghaznavi (President Jamiat Ahl-e-Hadees, West Pakistan); Mufti Jafar Hussein Mujtahid (Member Board of Islamic Education); Mufti Hafiz Kifayat Hussein Mujtahid (Supreme Organization for Protection of Rights of Shia-e-Pakistan, Lahore); Maulana Muhammad Ismail (Nazim Jamiat Ahl-e-Hadees, Gujranwala, Pakistan); Maulana Habibullah (Jamia Deeniya Dar-ul-Huda, Therhy, Khairpur Mir); Maulana Ahmad Ali (Ameer Anjuman Khuddam-ul-Deen Sheranwala Darwaza, Lahore); Maulana Muhammad Sadiq (Administrator, Madrasa Mazhar-ul-Uloom, Khadda, Karachi); Professor Abdul Khaliq (Member Board of Islamic Education); Maulana Shams-ul-Haq Fareed Puri (Main Administrator, Madrasa Ashraf-ul-Uloom, Dhaka); Maulana Mufti Sahab Dad (Madrasat-ul-Islam, Karachi, Sindh); Maulana Muhammad Zafar Ahmad Ansari (Sec. Board of Islamic Education, Constituent Assembly, Pakistan); Peer Sahab Muhammad Hashim Mujaddadi (Tando Sayeen Daad, Sindh).
I generally do not discuss such topics here because many are simply not interested and equate talking about Islam or sharia with violence.