I have read quite a bit about WW2 over the years, including Bloodlands by Timothy Snyder, which I highly recommend if you are looking at this book.
I am 1/4 Lithuanian, but all that was submerged into the melting pot here in America. I only learned from reading and talking to people, so I skimmed through to Lithuania in this book.
There are death statistics in various Lithuanian cities. There is a picture on page 138, of a local Lithuanian partisan group in action in Kaunas (Kovno) during the Nazi led frenzy of June 25-29, 1941 that shocked me. I am not naive about these things, but I have mostly read about them in places like the Lithuanian Quarterly Lituanus. Seeing the picture makes it hit home harder.
There was a lot of guilt to go around in those days, and emotions were high. Lots of Lithuanians had just been killed or sent to the gulag by the Soviets, when the Nazi's pushed them back from the Baltic states and elsewhere. Right or wrong, persecution came because most Jews leaned Communist, and for somewhat understandable reasons, like the terrible mistreatment they had received under the Czars. The communists offered what seemed to be a reprieve from that. Also, more opportunities.
It doesn't make these atrocities acceptable, but maybe somewhat understandable.
I don't think young folks should read a book like this, but I do hope people learn from the disaster of WW2.