Poland may not be the co-author of the aggression which broke in 1939, but it played an important supporting role in unleashing it. Had it not been for for Poland’s actions in the run-up to the Second World War, particularly after the Munich conference, the war may well have been avoided.
The American establishment, which has long used a particular set of tactics to trigger colour revolutions and regime change operations abroad, is now applying the same methods in the US racial protests.
The claim is made without evidence, and fits squarely with the Kremlin's paranoid view that no mass protest or civil uprising can take place without manipulation by cynical actors behind the scenes (most often the US). See here for our analysis of this narrative, with examples.
The nationwide protests against racial injustice and police brutality broke out in the US after the death of George Floyd in police custody in Minneapolis on the 25th of May, 2020. The protests followed several high-profile incidents involving African Americans and the police, invoking debates about racism in the US.