A revelation.
Tobacco plants where used by the native americans, the indians. They aimed to inhale the spirit of the tobacco plant. They did so buy letting the tobacco plant dry while being in ground and later smoke it.
Tobacco plant is prepared in tbe same way as acient plant sacrifices where.
I believe that there is a demon controlling the tobacco industry. And when you smoke, you sacrifice a living plant to this demon.
Therefore it is sin.