You can smoke if you want, I don't care, just people who then try and claim as though it's some sort of tax aimed at the poor is nonsense. This isn't some unavoidable expense that is primarily effecting those who are less well off, it is purely a personal choice to smoke therefore it can never be claimed to be a tax on the poor.
It is a tax that proportionally effects poor people more than rich people, partly because of smoking rates by demographics, partly because there's a limit on how much you can smoke in a day, but also because the richer you are the more likely you are to regularly travel and be able to pick up tobacco products duty free or in countries where rates are much lower.
A tax that effects poor people more than the rich is a tax aimed at the poor.