I try to remain as unbiased as possible, despite one group who'd want to kill me. Whereas the other, would allow my secular lifestyle.
With that prefaced, we're dealing with religious ideology, making an already tough situation (disputed land) even more difficult.
The Israelites were mostly a nomadic tribe within the region until conquering and building up the kingdom of Israel through David, Solomon, etc.
The land was later conquered by the Romans and much granted to the neighboring Arabs as time passed. The Israelites dreamed of a Messiah to take them to the new kingdom of Israel ("the promised land"), free from the Roman occupation.
Did you know the word Messiah, to Jews, doesn't mean "God"? There were many Messianic people before and after Jesus. Most Jews had hoped Jesus was the militaristic Messiah they wanted, to fight the Romans. You should look up it's definition if you're curious.
Fast track to a few decades ago and the British had laid siege to much of the land and decided to grant a portion of it to the Ashkenazi Jews fleeing Europe. This was part of the Zionist movement, seeing a new Israel created (to help fulfill alleged prophecy).
As you'd expect, the current occupants of the land couldn't have cared whether or not the ancestors of the newly arrived Jews had once lived there. As such, there began a war, and ironically in the first war even more land was conquered for Israel than would otherwise have been given to them from the beginning.
Now today, you have two parts of Palestine; the smaller Gaza (controlled by Hamas) and the West Bank (controlled by PLO). Hamas are a terrorist organisation, who've supposedly been selected by the people to lead them. They have decided to ignore any possibility for peace. The PLO on the other hand have claimed to want to seek peaceful relationships and remain with the current territories.
Hamas are much like that of any urban combatant and will seek shelter in hospitals, schools, homes, etc in order for maximum collateral damage of innocent lives. Not very good people. They also happen to be financed through Iran. In the way the US is in a proxy war with Russia, you have Iran now in a proxy war with Israel.
I sort have breezed through a lot of the history, but this is essentially the TL;DR on centuries of details and why it likely won't end until one side wins 😪 (because religion).