We could argue about who started (certainly it didn't start on October 7, if that's what you mean), but that's beside the point, I think. We can assume the the cycle of violence has been going on forever, with no clear initiator (or with an initiator on the losing side, for what matters).

Would you be relieved to know that they're taking your home and killing your innocent family because someone on your side did something bad before? Or would the sense of injustice push you to more violence against the other side? And how would you deal with the knowledge that the other side is actually gaining ground at each further round of violence, unilaterally deciding what's fair for them to take, and that even if you can swallow your pride and stay put, someone else from your side eventually break and provide more reasons for the next persecution?