Maybe I'm easily offended, didn't think so.
Does the sign worry or offend me? Not at all.
I looked at it and thought
1. Are they informing Muslims that unfortunately we don't sell Halal?
2. Are they informing Muslims that the meat is Halal, but just hasn't been certified?
3. Are they taking the Piss?
4. Are they informing the public of the type of meat, as if Halal is any different?
5. Are they appealing to people who have a bias?
When I look at the sign, apart from the 3 "offending" words, is there anything that would make a Muslim think it might sell halal meat, such as Arabic writing?
Is Halal any different to non Halal, other than it had its head lopped off in a way to not offend a fictional being?
How prominent are the words compared to the rest of the sign?
The fact there is very little other signage.
The animals? My take on that was they are there to indicate a traditional Aussie butcher, along withe the simple Black and white sign (clear glass being the white).
Are they appealing to Islamophobes? (As they are not a race)
Are they appealing to people who may have a bias against a particular group?
When I thought about all that I can to the opinion that the intent was option 5.
I made the comparison to Kuala Lumpur, as over there it was hard to find some foods. First day after a long flight with the fussy toddlers and went to get a simple meal they would eat without a fight. Pizza Hut was the obvious choice, Hawaiin Pizza although it turned out to be a Halal and the kids didn't eat Hawaiin chicken. The on it was easy when we went if we knew the kids wanted pizza or something particular to look for the non halal sign.