I think the Poles' problems stem from Stalin's first partnership.
Good night, AB. God bless, Germany. And it's good to know that someone in Europe has a job.
It is of course correct that the original problem was created through the criminal Molotow-Ribbentrop pact. No doubt that Nazi Germany and Stalin have the main guilt. Nevertheless the Poles fought like tigers on the anglo-american side (and never ever on the side of the Russians) and were sold to Stalin by the United States and England after the war since they were not useful to them anymore. In Europe we call such attitude treason, espechially if we talk about direct betrayal of brothers in arms. If you got another word for it - just let me know.
I am well aware that it is not PC to say this here, but it is simply the truth.
Soldiers might have the right to use a motto like "Semper Fidelis" if they give proof to it on the battlefield. If we talk about politicians they should better use "Semper Infidelis". The best thing is that you do not have to care about the proof. They will betray you sooner or later no matter where they come from. :(