"I am not sure why its hard to believe Nazis used fluoride"

And there we have it. You 'believe'. You WANT to believe it. Without any proof. You just want to hold on to that evil boogeyman story that you grew up with and was told was true all your life, and then when your belief is shattered, you go into a denial frenzy and attack the truth.

There there little one. You can do it. Overcome!