Stalin is a very useful character. You can blame him for everything and expect others to believe.
Still: 1) it wasn't Stalin who threw stones at the Germans being herded from Pomerania, 2) Other WWII allies agreed to the Stalin's proposal, making them allies's, not Stalin's decisions.
I don't want to whitewash anyone in that situation, the Germans themselves had given enough reasons for the hard sentiments. And Russians too, of course.
Nevertheless, any attempts by today pampered arm-chair self-declared moralists to judge the WWII vets and survivors are laughable.
What’s funny is that when the Muslims kick the Volksdeutsche out of Germany, they will be begging the Poles for them to “return”.