After Kievan Rus was decimated by the Mongols, a large part came under the sway of Lithuania (once one of the largest countries in Europe) and then Poland from the 15th century. In the meanwhile Moscow was the tax collector for the Mongols and Muscowy became the successor state to the Mongol Empire.
Moscow has tried to crush Poland over the centuries and vice-versa. Poland conquered Moscow in 1610 and was instrumental in Napoleon's capture of Moscow in 1713.
There is a lot of bad blood between the two.
Poland was instrumental in the dismantling of the Tsarist regime and in the collapse of communism.
Poland loves Ronald Reagan so you know ooga booga is not going to help them.