The singer, who takes conducting gigs wherever opera houses thinks his name might sell extra seats, waved the stick in Walküre at Bayreuth last night.
The booing began at the end of Act 1. Tempi were slow to the point of slack.
Frank Castrop’s production is admittedly freakish and may have attracted some of the dissent.
But Anja Kampe as Sieglinde, John Lundgren as Wotan and Catherine Forster as Brünnhilde were cheered to the rafters.
Domingo, 77, took it like a pro.
UPDATE: Why they booed Domingo