War is a form of existential incontinence. Matters that could be dealt with in a certain way become distressed, broken, dislocated, very messy.
When Muhammad (pbuh) had cleaned up the microcosm that he was born into and left us his template, he looked at inner and outer, greater and lesser. He said that outer warfare was less important than inner warfare.
The inferences are that if matters leak out into the lesser place from the greater place against a designed spiritual way of ordinarily dealing with such matters, then there will be a mess.
Muhammad (pbuh) also said that folks should seek spiritual knowledge to help them (avoid war) even if that meant going to China. The brackets are mine, but the inferences are clear, all cultural message carrying is under the Seal of Islam if it helps individuals to love one another through their differences.
O mankind! We created you from a single (pair) of a male and a female, and made you into nations and tribes, that ye may know each other (not that ye may despise (each other). Verily the most honoured of you in the sight of Allah is (he who is) the most righteous of you. And Allah has full knowledge and is well acquainted (with all things).
Qur’an Sura 49 The Rooms. Yusuf Ali.
Boundaries and walls are designed to be flexible, often permeable in the internal working of a body. If the inner, usually invisible walls of arteries or intestines become hardened or breakdown, then there is an emergency.
If the outer, actually invisible, permeable healthy walls and flexible boundaries between cultures and nations and Continents harden and break down, then there is an existential incontinence, there is very messy war.
In an attempt to deal with the mess as it starts to happen, physical walls are often erected to try to stop the final mess, war, from happening. These physical walls do not work because it is a vain attempt to solve a metaphysical problem with a physical solution.
Once in the wrong place in the wrong way, mess has to be cleaned up. Then, as quickly as possible, the invisible walls of behavioural flexibility and cultural permeability have to be healed, reissued by the common orientation of all mankind toward it’s Human source code, Love.
“In as much as collectivities are mere accumulations of individuals, their problems are also accumulations of individual problems … Such problems are never solved by legislation or tricks. They are only solved by a general change of attitude. And the change does not begin with propaganda and mass meetings, or with violence. It begins with a change in individuals. It will continue as a transformation of their personal likes and dislikes, of their outlook on life and of their values, and only the accumulation of such individual changes will produce a collective solution.” (C. G. Jung, Psychology & Religion (New Haven and London: Yale University Press, 1938) 95.)