what a fantastic post! there are defiantly some points you rise that I would like to go and take a look at, as of right now I've not watched the links you posted, Ill watch them on Thursday and get back to you.
I know a bit about the Amarna Period, my lecturer in Middle Egyptian was working on cylindrical seals from the city. I really love that site, its isolation has lead to remarkable preservation, and added to that, as it was only used in the lifetime of Akhetaten it truly was a snap shot. I really enjoy the sculpture of the time, in particular the debate as to if the elongation of the forehead and bellies is stylistic or evidence of disease, but either way, I love it!
I think its important to remember that this period was seen as a heresy even by the ancient Egyptians, and his son's were to spend their short time on the throne trying to put right what their father had done. Lets not forget that 'the beloved of aten' was soon renamed 'the beloved of amun' thats Tutankhamun. Not only that but there are many reasons why he died, not least a militarty coup by Ay and Horemheb, which was followed by the mighty 19th dynasty and a surge in the power of both memphis and thebes.
It is this reason why I found it interesting that you compared Roman behaviour in Egypt to Roman behaviour in Albion. Both Rome and Egypt were Atenist at this point whereas Britain would have been Amenist.
do you mean at the time of the invasion, in which case Rome was still pagan? I may have miss read that though, I am dyslexic so it happens. But hay I defiantly will go away and look into the moses thing and the beginnings of monotheism.
As for the traditional view of celtic culture, well thats intresting too. Most of what i was taught at uni (i did not actually do a modual on the celts per se) was Barry Cunliffe's work, how ever I'm just in the middle of reading 'The Celts, Origins, Myths, Inventions' by John Collis, (thanks Giovanna) and it truly is making me think again about just who or what the celts were and if there is such a thing as the celts?
As for human sacrifice, my gut instinct is that the writers of the time would have known the difference between human sacrifce in a ritual setting and that of capitol punishment, but again the jury is out.
Thanks for giving me lots to think about, and im sure others will have a few things to say!