Disclaimer: I am not trolling, I am an autistic person who doesn’t understand so many social nuances. Also I am from New Hampshire (97% white), so I just don’t have any close African-American friends that I am willing to risk asking such a loaded question.
Irish-Americans found an affinity for corned beef as they finally had access to meat and especially beef. They initially lived in and near Jewish neighborhoods, so, it became popular to boil up corned beef, cabbage, and root vegetables.