Yes, massive amounts of about anything is toxic. We're not going to get that from municipal water or toothpaste.

Although fluoride is safe for dental health at low concentrations,[1] sustained consumption of large amounts of soluble fluoride salts is dangerous

Literally your link. I'm in my late 30s. I've only lived in places with Fluoride in the water my entire life, and both my parents and I have chosen to have regular fluoride treatments and fluoride toothpaste. I don't need advice from Lemmy, if what you were saying were true I'd be dead decades ago.

As the other person said, everything will kill you if you have too much of it. Water can kill you if you drink too much. Either you believe some very incorrect things, or you're a troll who is doing pretty well here getting us riled up.