People don't want fluoride because of its adverse affects on the brain... How much the content in toothpaste will affect you I don't know. I'm not stating this as fact as I have not done any research into the subject what so ever. I just know it is the reason people do not want fluoride in their toothpaste.
I think it might be people only reading half of what they think they are reading.
Fluroide facilitating the absorption of aluminium across the blood brain barrier, might be why they think they don't want fluoride.
Anyway. People can think what they like.
Advice is to use a fluroide toothpaste, as part of a healthy diet with limited sugar frequencies during the course of a day.
In truth, if you consume less than three sugar frequencies daily, then you probably don't need fluoride in your toothpaste. The issue is the mentalist folks who spent their days reading the whats bad for me forums and various 'health' sites often do so while stuffing their faces with fermentable carbohydrate foodstuffs.
Then with big holes in their teeth, as they probably refused radiographs to aid early diagnosis, tell the dentist the fillings are poison too, yet have taken no steps to avoid a completely preventable disease.
Anyway, won't help them with gum disease, you need to be brushing, you need to kill off as many bugs as possible. Avoid smoking and the like.