The gov t-mandated weaering of these discs immediately brings to mind the yellow stars imposed by the Nazis, who cannot be brought to mind without also bringing to mind the death camps and ovens and gas chambers, and all. As a Norhetorical device it is fair for posters to use.
Norhetorical should just be rhetorical.
I disagree with you. They aren’t being made to wear it because they’re Juden, but due to dietary restrictions. Muslims will wear the same things.
That said, I think this is a bad idea. Have the foods be marked Kosher/Halal, or better yet, bring your own food.