It seems that one or two European countries ban fluoridation; however few practice it. But "Europe banned this" is simply false. Moreover, it seems that there is fluoridation of salt instead (eg in Switzerland).
According to the other Wikipedia article, fluoridated salt where it is used (Switzerland and Germany) has about a 70% market share, so there is a choice for those who don't want it. It's a lot harder to opt-out of tap water.
https://en.wikipedia.org/wiki/Water_fluoridation#Worldwide_p...