This is a product of the currently ruling party, and the elections are coming. While Poland still should get some kind of support from Germany for the damage it caused in many aspects of life here, I don't believe that reparations are what we should and what we could get. The issue has been closed and that fact has been confirmed by Polish government most recently in 2004. The only country we should and could get reparations from is russia, as they actually made Poland to pay (by forcing it to buy subsidized coal many years ago) instead of be paid, and apparently USSR made a promise to pay the reparations.
So currently ruling party is not really about getting something for Poland in regards of WWII disaster, but it's only about winning the next elections and seemingly weaken the country once more. Please keep in mind that we have a prime time for russian trolls here and it might take some time if we could ever get rid of them from the politics. To weaken Poland means to empower russia influence here, but sadly many supporters of the ruling party don't connect the dots this way.