The Örebro Party in question actually split from the Left Party and describes itself as leftwing. The founder describes himself as a Marxist.
> While Allard has described himself as a Communist, and a Marxist, at its founding in March 2014 he defined the Örebro Party as "broad left". At that time the party considered itself a "local party that wants to carry on the labour movement's ideals", and "not interested in administrating the current society".
It's almost definitionally entirely the opposite of Marxism, since that's precisely about recognizing social conflicts caused by things like immigration and poverty as a bourgeoisie plot to divide the working class, to deflect it away from the actual problem. That's why rich people donate to far-right parties in the first place, it's in their class interest to do so.