Islam is unlike other religions. It isn't just about belief or faith, or merely a religion.
Islam is a complete way of life with its own laws, justice system, it dictates every aspect of the followers life with rules to abide by everyday.
From when Muslims awake, to how they wash, use the toilet, marriage, sex, entertainment, activities, diet, how to eat, conduct themselves, trading laws, politics, their money & how they lend/borrow/bank, etc etc.
The religion is not separated from daily life.
Scholars, are followers legal counsels who followers turn to in times of trouble or marriage difficulties & they appoint judges to resolve disputes between the community in accordance with Islamic laws.
A Muslim is obedient to & submits him/herself to God. By following these rules of life as dictated in the Quran and living life as their prophet would have done, they believe they will one day go to paradise.
Unlike other religions, it cant just be left at the Church/Mosque after Friday prayers as the laws of Islam cover every single aspect of their daily life.