You say the Hlaalu "accommodated" the Empire's legion, it was proved you were mistaken. Then you went on a sterile tangent on dictionary definitions.
I reference points made by other people and you went on saying that they're invalid because it's people who agree with me.
You claim the Hlaalu have betrayed their country, when shown that the claim is wrong (they didn't, even if they wanted to, since Vivec took his decision alone) you claim that they wanted to because they absolutely wanted to betray their country for the profit of the Empire.
You continue to be completely hanged up on that "accommodation" word claiming that the Hlaalu apparently wanted to try each definition of the word in successive order, because surely if diplomatic accommodation didn't work then they'd tried aiding and abetting their enemy, right?
Look up on a map yourself. Narsis has always been the Hlaalu capital. Look where it is. It is not reasonable to assume any land belonging to another House could have been to the South-West of Narsis.
There is no doubt that the solution the Hlaalu suggested wouldn't have worked. To claim that it is betrayal, though, is ridiculous. From their point of view, this was the best way to safeguard the interests of their nation as a whole.
In very short: your claims that the Hlaalu betrayed Morrowind are spurious because, if they had wanted to as you absolutely insist, they just didn't have the opportunity to do it. As a House of traders, they greatly benefited from annexation since it made trade easier to practice by removing many barriers that usually exist between countries; this doesn't mean they had planned the whole thing from the start, just that the situation favored them.
The Hlaalu do not have one single defining characteristics shared by all their members, even if you only look at the leading elite: Duke Vedam Dren is entirely within the Imperial system because of his status as a Duke, his brother Orvas Dren is head of the Cammona Tong and strongly anti-Imperial, he is also a rich slave-owner so you should like him; his daughter Ilmeni Dren is an abolitionist who helps the Twin Lamps (so you'd probably hate her). That's the ruling Hlaalu family in Vvardenfell: three persons, three totally different views on the world.