So yeah, ethnolinguistically swedish. There is genetic variation inside Finland, between coastal finns and those of the interior. The coastal ones have larger admixtures of scandinavian/german, for obvious geographic reasons. The linked article makes that particular point, that the rurikid itinerary picked up finnish heritage along the way. Genetic heritage is not the same as cultural, is the point, and different heritages can overlap and have different proportions depending on the area. The same way anatolian turks have large admixtures of greek heritage depending on geography (especially coastal), but it is not something that is politicized or accepted in any way. And vice versa in Greece. As if greeks and turks did not interract with each other genetically and culturally during the hundreds of years of Rum and Ottoman rule, and remained distinct and separate all the way to the early 20th century population exchange, when greeks were ethnically cleansed from turkish territory and vice versa. The genetic data makes clear that this is a fantasy. The turkish migration into annatolia shows relatively small genetic impact, the conclusion is that it was mostly elite replacement and acculturation.