Even secular people have laws. For example, you steal, their is a punishment. You kill, their is a punishment. Not alot of people in the world believe in anarchy. So almost everyone agrees on the neccessity of law and order. The differences in Islam, is that laws come from God, not some people, and the punishments and enforcements are from God. We trust his judgement and not the judgement of ignorant people.
Also the judges must judge with full knowledge - and do so according to revelation - not their whims. The Messenger (saw) judged by means God makes him see, judge with justice according to what God revealed, as shia I believe this continued to his successors, and the scholars should judge according to the way adopted by the Messenger (pbuh) and his successors (as).
No one has the right according to Islam, to judge according to his own opinion and judgement, and no laws pertaining to society can be formulated from other then revelation.
We all follow law and order and judgements. The diffrence between us and the west, is that we believe in God's laws, order, and judgemetns, and not some opinions of some people.