Reading a holocaust book, and having very strong conflicting thoughts

Hello all Short introduction, FFB, (some even say chabad, as i am a sympathizer) married with kids, GRANDPARENTS ARE BOTH HOLOCAUST SURVIVORS!! A friend recommended me a book, “responsa from the holocaust” which i read in 2 days. This book messed me up. I did in the past always hear stories from holocaust, but for some reason, this book had a special effect on me to the point where i feel stupid putting on tfillin, keeping kosher and so on. How can we be the “chosen ones” when such inhumanity was brought onto us??? Thank you to all who will help me keeping it real