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The original of Primary Chronicle didn't survive, but still, the Hypatian Codex clearly separates Varangians from Rus as people, and the earliest Arab sources, such as the one of Ibn-Khurradadhbih, also explicitly mention Rus to be "one of the Slavic peoples".
Moreover, in Primary Chronicle it is also mentioned how Oleg (who was Rurik's contemporary, so "Slavicization" argument is impossible) and his druzhina swore by Perun and Veles to confirm a peace treaty with Byzantium in 907, and we find the same done by Igor in 945, and again by Sviatoslav in 971.
The whole mantra that Rurikids were Scandinavians starts with the Normanist theories in 18th century, furthered by "Romanovs" (not the original line) and Gerhard Friedrich Muller, and was opposed by most sane-minded members of Russian intelligentsia, even by Rurikid descendants themselves.
It merely disappeared when it went away, massively outnumbered, in form of some East Germanic tribe.
And cheating of woman unbeknownst to husband does not make man a "cuck", that is such a dimwitted stance of modernity. Evola put it very well:
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