How you can say exercise is not a long-term solution is beyond me.
People have been eating carbs for hundreds of years. It's not like they were discovered 10 years ago. Obesity has only become a big problem in the last 15 years or so.
Given the fact I've pointed out a wonderful book that will address every point you made, I will reply simply to the two.
1) Exercise stimulates appetite. Our bodies are notoriously good at ensuring they maintain a consistent weight. (Just watch what happens when someone stops a diet, or gets out of a long period in hospital, or stops bodybuilding 6 days a week at the gym). I'm not saying exercise isn't good for health, but it's a poor way of trying to maintain weight loss. Just as starving yourself is ineffective in the long run.
2) I'm not sure if you are familiar with the long time periods over which evolution acts, but hundreds of years are irrelevant (unless you are referring to selective breeding, which we're not).
Further, you will note that over the time period you refer, crap like soft drink consumption has swelled, but far more significantly, our fear of dietary fat has exploded, leading to higher carbohydrate consumption for many reasons, including but not limited to the ridiculous "low fat" foods which generally remove fat and replace it, inevitably, with carbohydrates, and also people simply choosing to eat less fat, which leaves a hole only to be filled with either protein of carbohydrates.
Who are the most obese people in the world? The poorest? Why? Look at what they eat.
Anyway, I'm not here to force you to believe anything. Your observations in life may be enough to retain confidence in the truth of what you believe and that's fine.
Personally, I prefer to seek out copious amounts of irrefutable evidence and data to base my choices on.
