Well, I don't drink gallons of soda.... or I
disagree with doing so would be a better way of putting it. I also don't go around slapping big gulps out of people's hands either

Nor do I walk around extinguishing the cigarettes of smokers. I just disagree, so what? It's not like my opinion really changes anything.
We all have our opinions, and we all are stating them, stop feeling like you are under attack for your opinion, and simply acknowledge that others have differing opinions.