It’s interesting how international and Japanese fans are reacting differently. Most Japanese fans, even those who aren't fans of Ado, feel that she and the organizers were in the wrong.
(Of course, K-pop fans spewing unnecessary rage and hate at her deserve the criticism.)
Kpop fans really are a pathetic breed.
For context, they're flipping off the stage after Ados performance (she sang Odoru Ponpokorin)