Whatever the 'Ultras' group said or wanted, the public line from the club at the time was that the stand moves were called for by Steve Bruce after Aluko had missed a penalty in front of a North stand full of Sunderland fans trying, successfully as it turned out, to put him off.
Now it isn't hard to believe that the club don't always tell the truth, but the suggestion that the club used the Ultras as an excuse to move people is simply not true. It was never attributed to them, but to the manager at the time.