Basically, you have no idea was islam is all about. Unlike Christianity , islam provides complete guidance about how to rule the country.
Shariat is the code of law which tells dos and don'ts of a theocratic state.
The best system of government was the islamic system,which wiped out income inequality, class system and accumulatiom of wealth .
Western nations are afraid of any governance and economic system that could challenge theirs, that's why they spend too much money on campaigns against islamic system or shariat.
They have established schools in muslim countries where children are taught that islami governance and economic system is barbaric and old.
Every muslim country has a liberal and secular system , still they are unable to compete western nations, whereas when we had our own system we were the titans.