Fair enough. While I agree sugar is poison, so is alcohol. When drank in moderation it can be enjoyable. When addicted to it, it can kill a person. Similarly I don't think the problem is sugar, but rather sugar addiction. Eating a slice of cake for my birthday is fine. Eating large bowls of ice cream and two cans of coke every day is deadly.
The trick is to teach people that sugary foods are more enjoyable when they are special treats and not an everyday food. It's true. If I eat one small bowl of ice cream every other week, that ice cream tastes so much better than when I eat a large bowl of ice cream every day. Same with soda. I put two cans of soda in the fridge every Sunday. I can drink them whenever I want, but when they are gone, they are gone for the week. Soda is terrible for me, but when drank in moderation like that, it won't kill me.