I'm not saying this to dunk on IKEA, but sometimes even when there's a sole founder, the mission of the company and the mission of the person who founded it do not necessarily align.
EDIT: It also seems that the party is extremely left leaning but is anti-immigration, as a person who lives in Swedens third largest city (which is predominantly non-Swedish, like myself: I am also an immigrant) I can understand Swedes desire to minimise this, it's not a "far-right" topic anymore.