When the newspaper GT published an interview with the football player, the elected representative wrote that "He reminds me of what I pooped out this morning" in an email to the reporter.
He tells the newspaper that he has only expressed an opinion and stands by it.
He is also said to have expressed himself in a similar way in emails on several occasions before.
The person had no political assignment in the municipality, region or parliament, but was elected to a position of trust within the party.
Now he is leaving the Sweden Democrats with immediate effect, GT reports.