UWCA told the the song was requested by a lone member and was not part of the pre-planned music selection for the event.
They said the individual who requested it, and another person who was not a member of the group, would be barred from future events.
They said most attendees were unaware of the origins or connotations of the song.
In a statement, UWCA said it rejected any allegation its group normalised racism.
“Our members have consistently campaigned against anti-Semitism on campus,” it said.
“Our members have also worked hard to ensure the Student’s Union commemorates Holocaust Memorial Day in a fitting way. We are proud of these efforts and will continue to stand against discrimination.”
UWCA added it was committed to ensuring anyone else found to have knowingly engaged with the song was no longer welcome at events.
“Once again, we apologise for the hurt this incident has caused and will fully cooperate with any subsequent investigation initiated by the university,” the statement read.
