Amir, you can't win this battle, as it is sprung out of nationalistic ideas, censur of facts and so on, it doesn't matter that the DNA straight father to son found in those descendants mainly are found in Scandinavia, or the fact that Rus was not a homogeneous people, but they shared a specific way of living, culture, just as most of the people living around the Baltic sea actually are balts, including Swedes, Danes, North Germans and Poles in a wider sense, that's how we should understand the term "Rus", it's a conglomerate of people consisting of various tribes but living under the same rules and conditions. Firstly they were traders, secondly, they could all become varings, meaning that they got paid for doing raids or protection, thus known as Varangians. Slavic people before Rurik are not known for anything special, they had simple life, hunter and gathers, nomadic, some had cattle or did some minor farming, the Finns WERE indeed firstly hunters and gathers and farmers, it's important to not confuse the chronological development, with what people later became.
The increased population in Scandinavia under the end of the Iron age led to a high culture, they become more advanced so to speak, and that was the main difference that led to their expansion towards their neighbors, they took what they wanted and exploited both people and resources, they took slaves and put them in mass production, among others places the most famous was Birka, it was nothing else than a giant concentration camp, the gods produced there was sold and traded widely, more, people who was not taken as slaves, had to pay tribute in form of local collection of food, raw materials, fur etc, this was a tax, and that's also a part f why these Scandinavians got so spread out the coast around the Baltic sea, they needed trading stations as well as supervisors of the tax system, and obviously, it worked so good that when they left the control in the eastern parts, people experienced anarchy instead, and that's why they brought over this Rurik, to restore order and stability, it's simple as that.
