Your answer for the past is that Israel should have been allowed to take "back" these (holy )lands, important for all the "children" of Abraham, perhaps that the arabs are also attached to these lands and would prefer to see them ruled by arabs/muslims, and not israelis/jews, they also had/have an importance for christians(, crusades). If they ever agree to lose one of their "hearts", then fairness would require to give one of our "hearts" in exchange to palestinians(, with a lot of money, e.g. 0.1% of the g.d.p. of every country for a year, as well as the promise to leave the Middle-East alone, to lift sanctions, to ensure the security&'total separation' of both Israel and this state, etc.)
I think that it is the root of our disagreement, you're starting from their right to take these lands to explain that the sins done by Israel were necessary(, if so are they still sins ?,) since they had hostile neighbours who wanted their destruction. Destroying Israel would be awful, but destroying Palestine is justified because they didn't accepted Israel in the first place. Perhaps, i think that their desire to expand their borders is more important than their desire for security, but to get back to the "root" of our disagreement, you've seen that i'm not among those who want israelis to g.t.f.o., but i can't blame those who do(, would you have accepted if they took one of our "hearts" by force ? It's not Mecca or Medina but still).
You may think that it's not such a big deal to take/keep these lands, perhaps you're right, everything is relative, then perhaps that in the same sense it wouldn't be such a big deal to give them a territory as well(, it could be the occasion to seal an alliance).
If you'd like a one sentence summary : You probably wouldn't have accepted it either if islamists took a portion in the heart of our lands, not by might at least, but possibly if you/we were given something which would 'be satisfying'/'made it acceptable'.
Now that i think about it, i can't resolve myself to say that they don't have any legitimate right to revive their culture on their ancient lands(, still don't agree with their refusal to be christian or muslim as well though, John and Muhammad ﷺ were prophets, the disagreements aren't worth such profound schism, we follow Abraham, and more importantly (virtues and )God, christianity and judaism could be considered as sects of islam, or all of them sects of abrahamism(, that's diversity without unity here)), but i know that we(sterners) wouldn't owe arabs anything in exchange if it was totally just/fair to take these lands, so i'll stay with my conclusion : the problem isn't that Israel's existence isn't accepted by palestinians&muslims, but that we didn't made its existence acceptable, in other words it's up to us to make this right.
You'll probably say that we won't make their loss acceptable, then i don't see why they should accept it, or why they should care if Israel disappears, if it's the law of the strongest then they have a chance to win( for all i know).
I don't understand people like you.
For me, it's impossibly naive to believe that our disinformation( doesn't exist, or) will be censored as much as the disinformation of our opponents, yet that's apparently the new mainstream opinion.
And x.com is the only social media to have implemented Community Notes.