No, Green Witch suggested the history book so you would understand the historical context and have some idea as to why some are offended by this shirt.
As for younger, non-Jim Crow era blacks, I would bet that there is a much smaller percentage of them offended than their older relatives. That's just the way things work. The farther away in time a society gets to something, the less importance the event has on any one individuals life, thoughts and actions.
I had a friend once who truly offended me. But as time passed, I am less affected by his offense. I still remember it, and if he we to push it in my face I would not be happy. But I don't dwell on it when I am around him. My children have heard stories of this, yet they are not offended by this the way I was. It was not something against them, it was against dad. While they may think less of him because of it, they are not offended to the degree I was. In time, the story of this whole episode with my friend will be lessoned until at some point it will be forgotten, maybe in the grandchildren's time, who knows.
Same thing here. There will be fewer and fewer who will be offended by something like this shirt until in time there will be none at all. Hopefully.
