Is this offensive or just PC madness?

There was an alcoholic beverage which showed a witch burning at the stake. I think the name was something related, like "witches brew" or something. People complained, and while I know it's our first reaction to be like "omg, who cares?" just imagine if they showed blacks hanging from trees on wine, or jews in ovens? The truth is, many witches were burned at the stake and that was a tragedy, so how is it different than any other minority group? You might laugh at it, but are you really being logically consistent?