What matters isn't who came first. What matters is that no one has the right to expel a human from a land they're living in. That is the core of the Israeli Palestinian conflict.
I am pro Palestine, but have no issue with the increase of Jewish migrations in the 19th century. The problem is not Jewish migration. It is the fact that Israel expelled Palestinians from their homes, murdered them, suffocated them, and made their lives miserable.
And this is the same thing that was done to the native people of the modern day Americas.