Ukraine is renaming Russia to Muscovy and Moscow is not happy, it is more than a taunt, but a historic reference to Kyiv's primacy and cultural leadership in the Slavic world and culture, by those terms Muscovy is an upstart. It signals a shift in the cultural center of gravity, Russia may be bigger, but Ukraine will be free and prosperous, a part of the European community and militarily strong.
Naturally if culture is repressed in one place it will flourish and grow in the other, if free to do so and with a thriving economy supporting it. Ukrainian democracy and prosperity are what Putin and this crowd fear the most, it would represent a cultural threat to them and alternate center of power in the Slavic world and it would infect them with freedom, liberal democracy and the ultimate dissolution as a vast empire. Ukraine would naturally become the center of Slavic culture, news and entertainment that will spill into Russia. Ukraine and Belarus will change Russia for us, if Ukraine wins this war and Belarus becomes liberated too and it will be almost automatic, unless an iron curtain goes up through the middle of the Slavic world.