That boy has a limited amount of knowledge about physics, orbital mechanics, the total weight of the space station and the amazing minimal weight of the space station. Please crash it over Central Texas at night as I would delight in the amazing light show. If lucky I might pick up a bit of the debris.
Correct. Virtually all of the ISS would break up and burn up. A few small pieces might survive re-entry, a few of those might be radioactive depending on what is used to provide power. If the worst of it landed on a city the Russkis might, might, kill 5 people and injure 100.