the problem is that these Muslim countries are not following Islam in true sense,eu was also based on religion i.e christanity and have learned the teaching of unity of Islam in true sense as in their libraries you will find books about Hazrat Umer R.A way of governance .We have to look at timing of Holy Prophet(P.B.U.H) to understand true teaching and essence of Islamic concept of one ummah where Arabs and nonArabs had equal rights and nonArab and Arabs are united due to relation of Islamic brotherhood ,if we look after that golden period of Islam we will not understand Islam properly