Tobacco is a poison.
It's unacceptable because the (white) people who named it didn't think that tobacco plantations are connected with slavery.
I'm not offended because I'm white and I didn't make any connection either with poison or slavery.
It isn't up to other people, who (like me) weren't offended, to say it's ridiculous. Similarly I didn't think how offensive the statues of slave-owners were to people of colour, until I was given enough information to make me think about it. We're the generation who've had professional careers and families, and been told we failed the interview because we were likely to get pregnant. I doubt those men thought they were being offensive, but they were.