Personal take - any I am by no means claiming to have the "end all and be all solution here": any intellectually honest approach will have to go at least as far back as the birth of the Zionist movement (whilst taking into account its historical roots as well as its then contemporary ones).
Debating over, literally, Biblical history (more like: mythology with snippets of historical information strewn in) is equally as useless as pretending the whole conflict began on 7 October.
At the same time, we should also be questioning the concept that history somehow lends a deeper level of legitimacy to a narrative than current facts do. And, although I am "pro-Palestinian" so to speak (that is an over-simplification but not the point here) I am going to, very deliberately, use an Israeli example: while it may be true that, 150 years ago, there was no Tel Aviv, it is also very much true that Tel Aviv exists today. Tel Aviv has very little "history based" legitimacy for its existence - and yet: if anyone were to say "raze it to the ground and let the people go live elsewhere" they would - rightly so! - be called advocates for ethnic cleansing. At best!
By this, I do not mean to say "status quo is right" - it is clearly not. The occupation, to name but one example, is very much a feature of the status quo that must not be allowed to prevail. What I AM saying is that I genuinely don´t believe that any of this can be successfully addressed by picking some necessariy arbitrary point in time and saying "well, this is the basis for what is right and legitimate".