Um, the things Israel has done to Palestinian citizens in Gaza over the past 15 years (e.g. [0] - [3]) have been pretty horrific, as are the things Hamas has done to Israeli citizens. This situation didn't randomly start on October 7, 2023.

[0] https://www.ohchr.org/en/press-releases/2015/06/un-gaza-inqu...

[1] https://www.hrw.org/news/2018/06/13/israel-apparent-war-crim...

[2] https://www.ohchr.org/en/press-releases/2009/10/un-fact-find...

[3] https://www.hrw.org/report/2009/03/25/rain-fire/israels-unla...