I have read hundreds of free German opinions in the Internet, they were mostly anti-Polish or - when neutral - rejected any responsibility or shame. I don't demand responsibilty or shame from young people, I want historical context. Even www.shoah.de contains doubtful claims and recommends an allegedly WWII forum, where anti-Polish opinions are presented. At least two German-Polish forums were destroyed by hate-postings. CDU Forum contained many anti-Polish texts. 

 The expulsion of the Germans wasn't the biggest one in Europe. The SU expelled much more people during the revolution, civil war and collectivisation.