Ok, everything you just said is true, and a great answer if the question is “Why is chicken and watermellon a bad food to be assosiated with February/Juneteenth?”.
However, the question is “Why is it different from corned beef on St. Patricks day?” And everything you just said is ALSO true about how Americans treated the Irish upon their mass immigration to America during the 1800s. They were mocked for corned beef, potatoes, and alcohol. The Irish were assosiated with those items in Ireland for the same reasons black people were assosiated with chicken, and watermellons. It was cheap, and it fed a poor mans family. The non-poor (whites) mocked them for being poor.
So…you gave a great answer, but not for this exact question. And yes, I know the original question didn’t mention potatoes or alcohol, but it also applies for the same reasons.
I’m not saying what the company did was right, I’m saying those same racist stigmas for the holiday it was compared to is equally wrong.
I think a better answer is “It’s not so different. Both are wrong.”