But the origin of the text itself is not that clear especially in terms of authorship, which is a different topic than its reliability.
All is tied. Reliability depends also from authorship
however, we only have the muslim narrative to "prove" this war of the sanctuaries ;
From the moment where the Muslim narrative does not serve the Master narrative (Mecca/Kaba) thing that it believes historical, I consider that it has no reason to invent (why would it did it?) specific events it recounts. This war of the sanctuaries does not serve the Master narrative.
this might be a later construct written under the Abbassids ; this is my opinion based on historical events dated under the Abbassids when Mecca became the sacred destination of the pilgrimage.
Of course; all can be a later construct. However I have no specific reason to think it is. "Mecca" became the sacred destination of the pilgrimage under Malik.
All this is based on muslim tradition and it might be true here but this we don't know ; how can you be sure that it is or what are your arguments for this ?
Because it does not serve the Master narrative. Therefore it is (for me...) plausible (since one does not have any external sources), I do not see why one could not consider it as such.
I truly wonder as I don't think it is and I think this was totally made up during the Abbassids when they started writing the Muhammad legend.
The Muhammad legend (for me...) is the necessary context to 1/ understand the Quranic texts 2/ to explain its origins. It predates the Abbassids : go over the Muslim sources... But, of course, it is written in Abbassid time, as one have nothing before.
Or it could be that the Quran was a text that was central to a community but that community was quite small and not related to the Arab chiefs who fought against the Sassanians and the Byzantine ;
Then, the question is: how it be that this (Arab) community did not pass any hints to the others about the understanding of the text for example...
it was only later that this text was picked up, edited and made the central text of the new faith but loosing in the process its ties to its origins hence why the Muslims scholars always struggled to understand some of the text meanings.
Many things to elaborate here...