Earlier quoted context omitted.
What are the arguments used against iodised salt? Where would they get their iodine?
Pretty much the same as against fluorine in water in the States: it’s unnatural/a globalist conspiracy/killing our traditional way of life/a plot to subdue the people for . There is no scientifically sound reason against it.
[EDIT: as pointed out in a child comment, the taste actually comes from chlorine, not fluoride.]