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Not necessarily, and if they have, they might not know the ingredients. Even hummus, many people don’t know what it is made from. If someone is making a joke about genocide and forced to quickly switch gears to a culinary discussion, I doubt they’d play it off so well. They might, but I doubt it.
People pretty generally know that the Irish cook with potatoes, as a result of the Potato Famine and the resulting Irish diaspora. People are extremely likely to have interacted with people whose name and descent are Irish.