Break the household taboo. About pride, fear and Polish-Jewish roots

On October 12, the book "Dziady and Dybuki" by Jarosław Kurski was published. It's a break in the conspiracy of silence, facing the dark and painful past of your own family. Why is the discussion about Polish-Jewish roots inactive causing specified controversy? They are talking to Jarosław Kurski and Jarosław Kuisz.