This message is part of the Kremlin’s policy of historical revisionism and an attempt to blame Poland in having an imperialist policy towards Ukraine and Belarus.
The Giedroyc Doctrine is a political doctrine developed by a well-known Polish publicist Jerzy Giedroyć in the post-war decades. This Doctrine was aimed at the establishment of good relations of Poland with its neighbours through the rejection of any imperial ambitions and territorial claims against its eastern neighbours, the acceptation of the post-war borders, full support for the independence of Ukraine, Belarus and Lithuania. The Doctrine called on both Poland and Russia to abandon their struggle over the domination of other East European countries. In other words, the Giedroyc Doctrine fully rejects any Imperialist ideas.
The Eastern policy of Poland after 1989 has been largely based on the Gierdoyc Doctrine – Poland fully supports the independence and territorial integrity of Lithuania, Belarus and Ukraine and stands for the development of a strategic partnership with these countries.
The very statement that “Belarus is a natural part of the Russian culture” is a clear manifestation of the Russian Imperialist concept.
Read other examples of the Russian historical revisionism concerning this issue - Signing of the Molotov-Ribbentrop pact thwarted the UK’s expansionist plans in Europe, The Molotov-Ribbentrop pact did not violate the rights of the Polish state, the shift of all blame for WWII outbreak at the Ribbentrop-Molotov pact the best example of manipulation of history.