That would be nice wouldn't it?
These parties are incompetent stooges for most part (my favorite party leader and most equipped to deal with SD is Sjöstedt, but sadly he is VP, weak party, soss needs leader like him)but SD however much they become a protest party for regular people looking for alternatives or attract more bigots with their excessive xenophobia, for them to have any shot of going all the way would require for them to become a full fledged party. Not obvious hatred agenda one that has every single faschist policy they propose to be about kicking out immigrants.
One track opportunistic operation you exploit can make you grow as it has over weaker parties, but requires more to to compete with and best Socialdemokraterna and moderaterna who have huge wholesome bases, virtually 3rd of the country each. Even if it's a major issue, you need more then immigration policies to attract biggiest chunk of voters. They done a sadly impressive job of misleading people past years and taking advantage of the lack of leadership in government, but need to spew more then hateful or fear mongering rhetorics to convince the masses for real to win.