Hahaha this is false. I am from the EU, live in the EU, and have travelled all over the EU, and I can categorically and confidently say that there are people this obese in Europe. I have no idea how common this is in the USA, and it probably is way more common than in Europe, but it does happen here too.

It's not diet alone. There are environmental and lifestyle factors as well.

Chemicals that have been outlawed in the EU because they mess with our endocrine systems are still heavily used in the US. Businesses have better representation in Congress than citizens do, so commercial production has far fewer environmental and health regulations in the US.

Walkable cities/towns are rare in the US. Zoning laws in many places put residential properties far away from things like grocery stores and workplaces. The norm for most people is driving (or maybe public transportation if you live in a city that's big enough to support it).

Decades of cheaply made food that doesn't trigger your body's "full" response