As someone who has had to study special relativity, a paradox usually only seems to exist because you don't properly understand the facts of the situation.
Polish government invited to this event people currently doing another genocide and also the descendants of those who did this genocide, but didn't invited descendants of liberators.
A Russian official today condemned the fact that Russians were prohibited from attending this year, noting that those attending instead were the grandchildren of the Wermacht and SS.
It reminded me of an interesting article (albeit I ought to state that the article has anti-Soviet ridiculousness in it) I read not too long ago in The New Yorker. (https://www.newyorker.com/news/our-columnists/the-historians-under-attack-for-exploring-polands-role-in-the-holocaust) which seems to indicate Poland’s and the Auschwitz-Birkenau State Museum have completely downplayed and attempted to suppress, through legal means, any historical discussion of any Polish individuals who contributed to and helped the Nazis.
The museum, following this article put our statements attacking the author and claiming any discussion of Polish collaborationism during the Holocaust downplayed German responsibility. So, in the end, the Auschwitz-Birkenau Museum might not be exactly what one would hope (or even, to some extent, expect) when it comes to historical memory of the Holocaust.