In spite of the fact that differences and variations are natural aspects of humans,

Let me give an example - more scientifically -: In Building Engineering the main idea is to design the building so as to serve a specific period of time that is assigned to it. Therefore, the basic equation is very simple and goes as follows: The resistance of the building (elements) is to remain greater than the applied loads or effects on the building (elements) throughout the duration of its life. This is a very simple principle!! However, when this simple principle is put to application, then every nation has its own method in achieving that purpose. And every one of these methods is termed as “Design Code”. So, there exists an American Code, European Code, Indian Code, Chinese Code, Japanese Code, Egyptian Code, etc. The main differences among these codes are in the calibration of the details so as to suit the Homo-Environmental parameters of the region where construction takes place. For example, in Europe, safety factors in the design equations are low, while in Syria or Egypt, safety factors are high. One of the reasons behind this difference is related to increased level of fraud, deceit and indifference in the latest countries compared to the first countries. And so forth, the details differ due to differences in homo-environment.

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And the same thing can be said about this religion: there is a basic idea and there are details. Islam has maintained the purity of the basic idea through its source book, with replicating it in several ways and several expressions in its source (Quran). In spite of the fact that differences and variations are natural aspects of humans, however, Muslims fell victims of the sectarian and political differences among themselves, and then they appended it to their religion and they accentuated these differences among themselves and made it more important than the main idea of Islam itself, and then they started fighting each other in the name of these differences, while these differences are a natural consequence of the mental and behavioural variations in human kind. As these variations are intrinsic in all humanity, and are implanted by God Himself so as to cause people to know each other, to form acquaintances, and to interact with each other (And We made you into nations and tribes in order to let you know each other)[49:13]. Not like what is happening in Iraq, Palestine, and other places, where they are fighting each other on the base of these differences.