Should Palestine exist?
Should the Western imperial powers have divvied up Palestine (and Europe, and many other regions for that matter) at the end of WW1? No. It was a grave mistake for which many peoples the world over have paid for with their lives, and continue to pay.
Should Palestinians have forfeited their lives and lands to make way for the creation of the Israeli state at the end of WW2? No.
Should the Western powers have continued to support Israel in its continued and continuing expansionism and displacement and killing of Palestinians? No.
Should the Western powers have taken it on themselves to impose regime change across the World. No.
Should the west continue to support Israeli expansionism and displacement and killing of Palestinians and Arabs. No.
The Palestinians are suffering in a conflict between proxies, Israel, Iran, Saudis etc, of former imperialist powers, US, Europe, Russia. In the meantime China bides it's time while quietly, or not so quietly, enforcing it power at home and abroad.
The Palestinians (and Ukrainians, Uyghurs etc) are at the very shitty end of a very long stick with an awful lot of branches.
It's going to be very hard to pull back from this but the first step has to be for the west to back off from supporting Israel.