Can you source that it is actually legal to say that an ethnic group of people have a lower IQ, in Sweden? I live in Sweden, and can attest to my own knowledge

Can you source that it is actually legal to say that an ethnic group of people have a lower IQ, in Sweden? I live in Sweden, and can attest to my own knowledge of the law, whilst not being a lawyer, that it is not legal. Let alone, reasonably possible therefore to have these things published in a journal here.