According to Allard, they're a populist party based on nationalistic and marxist values. Doesn't quite fit the left-right scale I'd say. But I guess "far-right" generates more clicks and stirrs more emotion.
Edit: I've been played for a fool. Thanks for pointing out that Marxism is just a branch of socialism. Downvote away, I do not condone nazism and this comment was bad. Will leave untouched though, as erasing history is a bad idea.