Ofc they would. So what? They weren't the rulers or had any form of government, most of the land didn't belong to them no matter how gerrymandering maps you want to draw. It was the British mandate before the ottoman before that.....
> mass migration of Jews there that displaced them
It didn't. The land Jews settled on was purchased since the 1880s.
A lot of those Palestinians were immigrants themselves who came to Palestine for work, and the Jewish population were the ones that hired them. Most of Palestine before the Jews started to immigrate and built was deserts and swamps, no one wanted to live there until the Jewish population terraformed them to be livable.
> Why is it that you think Palestinians only have the right to Gaza and the West Bank
Because they lost the war they started, you can't start a war lose and then cry that you lost territory. They didn't want a Jewish state at all, or be under Jewish rule.
That's how countries form, that's how borders are made. Every other country in the world was formed by conflict it's just that most of those countries annihilated the other side long ago so there is almost no one left to hear their voice or go on a twitter rampage.