I hear this fuss about sodium fluoride .. natrium fluoride.. fluoride found in tooth pastes. are they really bad?

Fluoride: All the literature I have reviewed says Fluoride is safe at the levels used in toothpaste. Fluoride has prevented several generations from having the kind of decay our parents and grand -parents had when they were growing up in a world with a lot less sugar in it. Imagine no Fluoride and all the sugar snacks children are exposed to today, now say rampant decay. Discuss with your dentist.