"It is not the function of Islam to compromise with the concepts of Jahiliyya (the ways of the infidels) which are current in the world or to co-exist in the same land together with a jahili system. Jahiliyyah, to whatever period it belongs, is Jahiliyyah; that is, deviation from the worship of One Allah and the way of life prescribed by Allah.It derives its system and laws and regulations and habits and standards and values from a source other than Allah. On the other hand, Islam is submission to Allah, and its function is to bring people away from Jahiliyyah towards Islam. Jahiliyyah is the worship of some people by others; that is to say, some people become dominant and make laws for others, regardless of whether these laws are against Allah's injunctions and without caring for the use or misuse of their authority.
Islam cannot accept any mixing with Jahiliyyah. Either Islam will remain, or Jahiliyyah; no half-half situation is possible."
Azzam and co:
