https://expo.se/ is probably a good start. You can look for Markus Allard, the head of that party. He shares a podcast with Malcom Kyeyene. For example their article here, Swedish, talks about the close connections between these circles (albeit Allard and ÖbP is not the focus there) and white nationalism https://expo.se/fordjupning/det-varas-for-rod-nationalism/