I agree with fishman, don't say anything unless you feel called too.
I got into a very similar discussion with my niece who graduated from Pensacola Christian College. She made the comment that Jesus didn't serve wine at the last supper but fermented grape juice. Now I didn't go to college but I felt like she was being side-tracked by what I call a "bible thumper". So I told her to look up in any encyclopedia or even a dictionary to read the definition of wine. This really through her a "curve". I think she was half expecting me to come back with some Catholic response. ( I did but it was called truth and she didn't recognize it).
But this kind of response from me started mess I didn't intend to start. Here is what happened.
1. Her mother (born and raised catholic but became a 'born against" er I should say born again fundamentalist baptist) told her not to ask me questions like that.
2. Her professor at college called me told me I was wrong and that I would burn in hell for two reasons.
a. I was not agreeing with what was in the holy Scriptures and was implying that Christ drank booze. His word not mine.
b. I was a Catholic
3. Her pastor called me and also told me I was wrong and a sinner for trying to justify drinking alcohol and indicating that Jesus would allow something as evil as alcohol to enter his pure body. He also told me I would burn in hell for practicing a pagan religion.
4. Both the professor and pastor told me that all alcohol was evil and alcohol was an invention of Satan himself.
5. When I attended her graduation I was even chastised some by members of her school, her college teachers, and her fiancé at the time.
For folks like this I tell them that I love them and tell them I will pray for them because they are stupid. Note here. It's not always smart to tell a fundamentalist they are stupid. Not unless you like Bibles shoved under your nose and being thumped.
Now is alcohol bad? Yes if you use it excessively and allow it to abuse you.
Also I'm pretty sure that wine or beer or even distilled spirits are not an invention of Satan. Mainly because in those days how else would some drinks be stored? Unless you like your juice with a nice growth of fungus.