Worker at water plant films Fluoride Toxicity, read it yourself

Did you ever read the warnings on your toothpaste tube... Then wonder why they add it to our water supply? Ask yourself if it's just mere coincidence that fluoride was first used in Stalin's gulags, then the Nazi's picked this up from the Soviets [as they did a lot of thing in the 1930s which most modern historians seem to ignore] and used it in their concentration camps. Then it magically appears under the guise of dental protection in most Western countries in the post-war era....why? And is it sodium fluoride (highly toxic), fluorosilicic acid (poisonous toxic waste), or something even worse and even more toxic in your water?