The Lurians demanded the Lighthouse, didn't they? I can't imagine how D'Hara or anyone else in the Moot would be able to stomache a shared realm project when the Lurians clearly want to take advantage of D'Hara, its previous situation a clear example. Matt himself even pointed out the relative importance of Qubel to D'Hara. Makes you wonder...
"The Lurians" demanded nothing of the sort. House Bedwyr, in the person of Koli, the son of the last legitimate Duke of the Lighthouse, was making it clear that he still holds his father's claim.
And D'hara's continued inability to feed Port Nebel is deeply offensive to Koli's religion, and resulted in the death of one of his uncles (on his mother's side).
Of course...It's not like Koli would shed any tears if D'hara gave him an excuse to sail an army into the Ports, but there are real and good reasons for what he did.
