Thanks Froklsnt! Yup, I think some of the factions who are clearly in the anti-Outsider camp like the Winter Court, Vadderung, the Grey Council had been wanting to strike at the Red court for a while (I’m sure Mab wanted to after the Ramps encroached on her territory in SK) but were probably waiting for the RCV to exhaust themselves in the fight with the White Council. TWG/ Uriel instead helped create a successful ambush that has the necessary firepower to succeed before the Ramps could take out a Starborn (the world’s most potent weapon against Outsiders).
@wardenferry
I do think it was hurried, & furthermore planned by Maeve, so somewhat sloppier than the elegance of Mab that we’re used to. Harry surviving Changes & coming out even stronger than before in CD must’ve alarmed the Black Council - they saw that Alfred was beginning to be of real help to Harry (kept them physically alive after a gun shot wound for 6 months, with help of course) so they had to neutralize him before he became fully aware of the islands capabilities & secrets - being ancient & brilliant, Nfected Maeve has concocted the plan so that keeping Harry the Starborn in check is almost a secondary benefit to the Black Council from this plan. Primary being of course, the rampant death & destruction created by the prisoners on the island, some of whom may be out & out Outsider allies.