The synagogue in Berlin thing is true, and horrifying!
As for "what people said even before Israeli retaliation started: I have NOT verified these claims - but I am willing to believe them in good faith! Because, quite honestly: humans, generally speaking, have an unfortunate tendency to descend into naked Jingoism if you let them! Also: I have, personally, had the misfortune of witnessing technically uninvolved, well meaning university students in London descend down the path of "f*ck yeah, suicide bombing!". (And then I lectured them on the nature and complete inhumanity of war and may, or may not, have totally emotionally blackmailed them with "as white Europeans, I get precedence of opinion over you - because you are sitting in a meeting that you read about on the SU notice board, and I have been to therapy because I was literally there when the IDF shot literal children - and it is NOT working, so: I am traumatised and you have no idea how one ends up traumatised! So: go fuck off, if you have no idea what "war" means in practical, lived reality!".
But, conversely: I have just, high-level, laid out where I am coming from. I am NOT expecting you to acknowledge - your language and data points lead me to believe I am to start at the very beginning - ARE YOU WILLING TO ACKNOWLEDGE that the occupation has also killed innocent children? Are you willing to believe me, a (presumably, assuming based on MN demographics) fellow white European woman, whose main crime was to have fallen in love with a Palestinian man and "gone to meet the future in-laws" at the exact wrong time, are you willing to believe me that I have seen the IDF shoot at children, seen a child get killed, and that, despite extensive therapy, I have never been quite the same ever after?
If you are: let us start from there, and let us build towards hope, rather than propaganda and extermination!