I don't consider tobacco to be in the same league.
Alcohol can be, and is, consumed responsibly by the vast majority of people for a variety of reasons. It is accepted as part of our culture and history. Alcohol IS the same as marijuana when alcohol is used for the purpose of getting high -- but I consider that abuse, not use.
And before you say it, no -- when an individual is willing to break the law, pay $200 an ounce for a product that's not even worth $2, risk arrest, legal costs, fines and imprisonment, risk losing his job, his car, his house, his family, his health, or his standing in the community -- he's not doing it "to relax after work". He's doing it to get high.
So tobacco is ok just because you think it is ok? You are aware that it is the most addictive drug known to man, and that it is responsible for many diseases don't you? And before you say tobacco doesn't get you high, if you do some research you will find that at high enough doses it acts as a hallucinogen. And if marijuana was legal would you consider using it to be ok?