Those concerns are for unrealistically high doses though. The last sentence of the abstract you linked:
In conclusion, based on the totality of currently available scientific evidence, the present review does not support the presumption that fluoride should be assessed as a human developmental neurotoxicant at the current exposure levels in Europe.
Calling concerns about the safety of fluoridated water “founded” is a bit of a stretch.
Oh don’t worry, the FBI will just be ordered to stop investigating hate crimes. Problem solved!