Some more thoughts:
- Maybe the findings at Belz-Kerdruelland will eventually support my hypothesis abou non movable stone shields. If the menhirs were destroyed by humans it seems not very likely these menhirs had a religious function. Since the attaquers probably came from places where there were also stone alignments and if stone alignments had a religious function, they could use them in their religion as well. If, on the other hand, stone alignments were purely defensive and the attaquers wanted to destroy the local defense structure, a scenario already widespread in 2006 is a good candidate for an explanation of the neolithic layer(s) of the site.
- Standing stones with relatively small holes have been found at several places. Maybe sometimes arrows were shot through these holes or the person behind the hole looked for possible ennemies through the hole.
- The fact that dolmens, stone alignments, ... were spread over a very wide area in the Neolithic, seems to indicate that their main function was not religious. I really doubt if there was a common religion over such a large area at that time. If there was such a religion, I think there would already have been found clear evidence for it. Typical orientations having to do with the sun and or the moon can be purely practical and are not a proof of any sort of religion.