It isn't them trying to co-opt historic Russian states for their own ends that annoys me most though, it's all the western academia and elites going along with it. I wouldn't be shocked if in a few years the complete historiography of Kiev and Moscow goes from they are literally the same people to some schizophrenic billshit like, Muscovy emerged as a loyal vassal state of the invading Mongols and are a mixed population of Mongol-Slavic peoples. Ukrainians are the true heirs of the Kievan Rus' and dissidence will not be tolerated.
We already do see some of this happening. Quite a few Wikipedia articles from the early medieval period on Russia and the Russian principalities include Ukrainian variations of names.