I suspect the whole "fat acceptance" movement arises from the overwhelming amount of judgement that fat people suffer, combined with the fact that until recently there was no practical treatment for it. It's the same process behind gay pride: it's not pride as in "I'm better than you", it is pride as in "I am not worse than you, no matter how badly you treat me".

Being overweight or obese is a medical condition, not a moral failure. If you can't fit in a normal chair, yes, you are morbidly obese, but that means you deserve more kindness, not less, just like we do with people who suffer a more severe form of cancer.

People who are fatter than you are not worse than you, they are sicker.

We evolved in a way that we really like calorie dense food. In the past that was a feature. The modern world by itself isn't harmful. But human demand will ( and in the us has) shift supermarket offerings away from what we evolved with and towards what our brain rewards. It's subconscious, and no one is really to blame. Some people with a more conscious approach are less affected, the rest just follows instinct.

I recommend you to go read or watch anything including the geneticist Giles Yeo. There are reasons people eat more than they should and it has lots of variables including genetics, personal variance, food environment and the composition of foods.

Bashing americans is fun and all, but if you want to solve a social problem you need a social solution, not blaming individuals.

Whole foods. Whole grain rye bread instead of sugary white toast so sweet it tastes more like cake than bread, for example.

it is also a lot more expensive and takes more time, effort and knowledge to prepare. there is a reason obesity correlates with low socioeconomic status.

i don't like to throw the bad lefty "p" word around, but check it

Furthermore, you could confuse hunger for appetite

A distinction without a difference: if you don't eat some more, you will suffer. In the long run, people eat until they are satisfied. Call it hunger, call it appetite, call it cravings, call it whatever you want. Stop eating too early -> suffer.

But how many overweight people are just eating too much

How do you determine what is "too much"? If you measure it by weigh gain, then all of them are eating too much. But if you measure it by "they eat until they are satisfied and no more than that", probably most of them aren't eating too much.

and don‘t exercise a lot or at all?

That I suspect is very common. Then again, many modern jobs involve sitting all day and the day has a finite number of hours, and at least in North America cities are car-dependent so many people don't even get to commute by foot. It's an environment that produces very sedentary people.

There is also lack of sleep, which I personally suffer from. How many of us are getting a good eight hours of good quality sleep every night?

There is more to it than "personal responsibility".

But how many overweight people are just eating to much and don‘t exercise a lot or at all?

Counter-question: how many non-overweight people eat too much but don't gain weight because of differences in metabolism, calorie absorption, etc?