An activist group has been told its float will be banned from the Mardi Gras parade less than 24 hours before it kicks off.
Organisers of Saturday's Sydney Gay and Lesbian Mardi Gras have told the Pride in Protest group it can't participate in the parade because of its social media conduct.
Members of the group have previously marched alongside a float under the banner "No Pride in Genocide" in support of Palestine.
But Pride in Protest posts on social media directed at a Jewish LGBTQI group have been deemed to have breached the parade's code of conduct.
Pride in Protest labelled Dayenu "pro-genocide" in posts on Instagram.
"No group has the right to target or vilify another LGBTQIA+ community within the parade," Mardi Gras chief executive Jesse Matheson said.
A letter was sent to the activist group on Friday, asking it to remove the posts and acknowledge receipt of the correspondence so it could participate in the parade.
Neither condition was met, so the float was removed from the line-up, Mr Matheson said.
"This decision reflects our obligation and priority to ensure the safety, dignity and inclusion of all entrants," he said.
Pride in Protest has called the exclusion "deeply hypocritical".
"It is not 'bullying' as Mardi Gras' CEO claimed to criticise organisations that support genocide," the group wrote on Instagram.
"The ball is now in Mardi Gras' court as to how much they wish to damage their standing in the community by banning participants critical of the genocide."
Dayenu had originally planned to sit out this year's parade due to safety fears in the wake of the Bondi Beach terror attack.
But the group reversed its decision, saying it had decided to march after consulting with organisers and police about protecting its members.
Pride in Protest has vowed to stage a snap march from Town Hall to Hyde Park to protest the decision.
