Good point. The families of vicitms have a right to learn of their loved ones' fate and burial sites but via channels other than the Sejm. Makes sense.
I'm all for the IPN working in a purely non-political role to establish what really happened, staying away from "resolutions" and "declarations" and instead working to establish the facts in Polish history. But they should also refrain from getting involved in party politics - all source material must be available (online?) to be examined by everyone interested, and anyone getting involved in politics should immediately be barred from working at the IPN.
Imagine if anyone could write to the IPN and receive an answer with what happened and where, free from political bias and heavy on facts?
There's no need to drag up the past in the Sejm - apart from when passing laws designed to make sure that the same never happens again.