Yes, Kiev was once the capitol of the Russian Empire. Utrecht was once the capitol of Frisia.
Both the Frisians and the Rus were originially Scandinavian, Viking nations. Also: Times have changed. Frisia has no claim to Utrecht, or Brugge. Russia has no claim to Ukraine.
My argument is that the statement of the Ukraine being the Original Rus is invalid, since there was a people called 'Rus' way before the Russian Empire ever was a thing. Was this people (again, a viking tribe) descendent from the Scythians? Well; it's not unlikely that they were. But then: If you extrapolate that logic, you'll end up claiming Kenya for the Navajo. Because the Navajo are descendents of people who originally came from Kenya (since, you know, all humans are).
The Ukraine lies in an area that was home to all sorts of indo-germanic and baltic peoples, and quite a few celts as well. Claiming 'original Rus' here makes no sense.