Not sure what they need to apologise for? Did Gillard apologise to Abbott when her Department incited a race riot based on an Abbott falsehood?
I think Pickering actually sums it up nicely:
"If Gillard had spent more time perusing that speech, instead of trying to slip her room key into Obama’s coat pocket, she would have seen the arrogant stupidity of it all. Maybe not."
http://lpickering.net/item/8121
