I'm in the early stages of preparing an all-duck campaign set in Glorantha, at the time Fazzur Wideread issued the edict that made the Durulz Tribe the scapegoats of Starbrow's Rebellion, put a bounty on their heads, and initiated the pogrom that drove them into the zombie-infested Upland Marsh.
Unfortunately I know very little about the public and real reasons for the edict against the ducks, which will probably matter if my group's duck refugees run into Sartarites who have a complicated relationship with the occupying Lunars (i.e., most of them).
I know that Starbrow's Rebellion is covered by several different books—I could go get one of them if I knew which answered the question, but most are out of print and acquiring a half-dozen books to track down one sentence or paragraph isn't feasible. There's very little mention of ducks in The Guide to Glorantha.
Why were the ducks blamed for the war and made scapegoats?