Even though Secularism emerged from hatred towards Christian clergy rather than Islam, it has nothing to do with the love or hate to any particular ideology or religion. Secularism is based on logic, and it is the logic of how best to run a country, a company, or a society. In the matters of governance religion has no role. Why do one has to be a religious person to administer generation, collection, and distribution of revenue? Law and order can be maintained very well without religious people? Fair distribution of wealth between capitalists and human resources can be done very well without invoking religion - through fair taxation and benefits.
Look, you seem to be an intelligent person, when not blinded by your bigotry, but here is food for thought for you. The proponents if Islami Nizam relentlessly give reference to the reign of 4 Righteous Caliphs as a model for any polity. But you must understand that the 4 Caliphs got their political power from a religious movement, but once they become Caliphs they made decisions based on logic rather than through their religion - the system of taxation, jurisprudence, establishment of military system, governance through appointed governors, a system of justice that addressed the grievances of people locally rather than through Medina or Kufa, the postal system, land reforms, laws about POWs etc. were all based on logic.
If all of this does not matter then consider the Constitution of Medina, which is the most secular political instrument ever implimented in Muslim history. This Constitution recognized the religions of each faction of Medina as their own personal matter and established rules of governance based on logic rather than Islam. This constitution ended the 125 years old civil war in Medina between different factions, only because it promoted logic rather than a certain ideology.
Remember, ideologies separate us; dreams and anguish bring us together. The dream and anguish of the people of Medina was peace and not another ideology.