He was a Kashub, who signed volksliste, wasn't he?
Thats a very
mysterious fact, we know that Józef Tusk was in a concentration camp, the mysterious bit is that we dont know in what character
he was there, supposedly as a prisoner but no record of his stay exists anywhere, from there he goes to Wechrmacht.
The case becomes even more spicy when you realise that Wechrmacht did NOT
recruit Poles into their ranks from concentration camps so there is an implication that Tusks family had an active part in German crimes against Poles but no documents exist either way apart from the very vague register of arrival.
Interesting, I didn't know it... Anyway I think that more important If he is a Pole, German, Eskimo or whatever else is that he is working against interests of Poland and Poles.
Its pretty important, there's an implication that Tusk comes from a family with Nazi roots and hid it on purpose, thats pretty big.