This message is part of the Kremlin’s narrative accusing Poland of having an imperialist policy and making territorial claims against Ukraine and Belarus. In addition, this message contains a popular disinformation narrative about Western attempts to organise a colour revolution in Belarus and to disrupt Belarusian-Russian relations. It accuses Poland of a plan to intervene in the domestic affairs of Belarus, which is a severe violation of the principles of diplomacy and international relations.
There is no evidence that the Polish Prime Minister Mateusz Morawiecki made the claims about the historical belonging of Belarusian territory to Poland and the Polish support for the Belarusian revolution. 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.
Poland is a neighbour of Belarus and it continues to support the Belarusian people. Poland respects the principles of international law and does not intervene in the domestic affairs of any country.
See similar pro-Kremlin claims against Poland - Poland presented a plan of active interference in the domestic affairs of Belarus, Poland and Lithuania directly sponsor open extremist actions against Belarus and Polish authorities are obsessed with an idea of reconstruction of a modern Polish empire.
The same article contained another disinformation message that Poland is calling upon NATO to establish a special military force to be used against Belarus.