Lol complete nonsense. Flouride doesn't strengthen bones. Also a concentration is not a dose. People in hot areas can easily drink twice the amount as people in colder areas for example. It'll also accumulate in much higher amounts in foods for example. Once in the water it's very difficult to control how much people actually get.
Less fluoride doesn't cause problems. It's not passed to an infant via breast milk. It's just straight up poison to the body. The level 1ppm in water in the us was chosen because that's the level they thought problems wouldn't show up with, only that assumption was incorrect. A significant number of people were getting dental fluorosis. Current recommended levels had to be lowered.
Somewhere in the doc he goes to a black only village, of course they are living in basically mud huts. And he asks what would happen if a white person came here, and they were like "death". So yeah literally just kill whiteys.
Big if true ... Here's the book: https://web.archive.org/web/20250911163616/https://www.amazon.com/dp/B0FQMF466K