The wiki for the Örebro Party actually describes it as not identifiable as left or right and the founder was actually far left. It also advocates for things like free dental care and anti-corruption. So things aren't as simple as purely anti-immigration which is very populist in Sweden.
The initiative to found the Örebro Party was taken in early 2014 by Markus Allard, who is also the first party leader. Allard had previously held positions as substitute member of the Örebro municipal council and district chairman of the Young Left in Örebro; in December 2013 he was expelled from the Left Party and its youth wing Young Left for "liking" the Revolutionary Front, a militant revolutionary socialist and anti-fascist organization, on Facebook and refusing to disavow it when questioned.