You seem to be missing the dissolved in water part: I think CaF2 + Na2C03 dissolved in water is exactly the same as 2 NaF + Ca C03 dissolved in water, but according to you only one is bad.
You seem to be missing the dissolved in water part: I think CaF_2 + Na_2C0_3 dissolved in water is exactly the same as 2 NaF + Ca C0_3 dissolved in water, but according to you only one is bad.
What do you think I'm confused about? Saying there is no difference between sodium and calcium fluoride is like saying there is no difference between sodium and nickel chloride...
EDIT: Regardless, I didn't reply to debate the effects of fluoride in drinking water. It's bad, I agree. But it's not the "turning frogs gay" conspiracy which was the comment I was correcting originally.