The Facebook message was condemned by community leaders who said the views were not reflective of the majority of Muslims in Australia.
"When you say your neighbour and they're having a festive occassion, you should be happy that they're happy," Keysar Trad from the Federation of Islamic Councils told SBS.
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The Facebook post has since been removed.
Samir Dandan, president of the Lebanese Muslim Association, told the ABC the post was an innocent mistake made by a junior staff member.
"From our perspective this is an innocent mistake done by a youth member employed by this organisation. We are basically not going to apologise for what I perceive to be an innocent mistake, not necessarily reflective of the true mindset and belief of this organisation."
