Kiev is actually older than Russia by a long shot. So it depends what timeframe you need to go back to in order to support one view versus another. 30+ years, 1200 years, 1600 years.
So the upstart Russia wants to claim "some farmland" based on conditions releasing that vassal state a few decades ago? How convenient. However, things changed since 1990. oops...
It took Russia long enough to come up with this reasoning. Wasn't this started because ethnic Russians were being brutalized? In a state that we now know didn't exist? I smell propaganda.
Please seat yourself.
I like the very things you hate.