My main argument is not that after the fall of the Assyrian empire, Assyrians were completely wiped out, this rateher sounds very similar to your friend chaldean's previous argument where he said, Chaldeans assumalated into arabs and persians. Before you put words in claiming that i have stated and make fun of them, you should look at your fellow assyrians arguments about chaldeans. Cause this doesnt make me look stupid, it just you who prove that your friend Chaldean isnt as clever as he believe he is. 
About these farming areas, if they were so large and so productive, dont you believe that that the foreign nations would have taken a lot of interest in these places and made sure that they put in heavy taxes or made sure they had total control and taken out the inhabitants of the area, and about my few spelling errors, let us have this debate in the language i have studied most, norwegian, and then we will see if i am a professor or not.