It's a pity your schools taught only nazi history, as health focus was clear in ancient greek or rome. It is not anything very modern, or weird, or nazi - like: healthy society contributes better to the pack. That's how evolution works, that's how any animal on planet grow stronger. Unhealthy ones were victims to predators, healthy ones would thrive.
Now we have real montary interest to not being healthy. Corporations want's people to be eating fast food and spending hospital bills. they created this all fat-acceptance bullshit up and made it in the way that doesn't sound like cut-off legs acceptance, cataracta acceptance, 'I never bathed' acceptance. If you broke your arm you do not accept it, just getting this fixed. If someone is obesse - oh, that's fine, lets accept it! you might die, get in debt, be a nuissance for everyone, but money flows, get a pizza.
Or people will keep saying 'nazi psychosis started with health focus'...
forgetting about their appeal to poor in the economically challenging time. corelation doesn't mean causation.