Even if the Sweden Democrats win big on Sunday, the election might be a force for good. The Moderate Party, which is likely to take second place, might split over the question of whether to rule with them. And the Social Democrats, already under pressure to move to the left, might likewise fall apart. Sweden’s party landscape, in other words, might be blown to pieces.If the country is lucky, some parts from this explosion will bind together as a new force — one that takes seriously the need for realism on immigration and integration, without falling for the siren song of right-wing populism.