its calling for the displacement of Israelis basically "back to where they came form", ignoring that they came form the region of Palestine/Israel
No, they didn't, really. Most ashkenazi jews were converts. And also: european. There's a reason why yiddish is so closely related to German. And jewish cuisine is clearly distinct from palestinian cuisine.
Jewsin diaspora are exactly that: in diaspora. They belong to wherever they live. You can actually still see the hole in German culture which the Nazis tore by murdering/displacing so much of the German population.
Claiming that a people needs to have some country to be purely for them is nothing, but blood and soil ideology.
(so no, they didn't sudenly turn up in 47-48, and Zionism is about a hundred years older than that - like I say, it's easier to brush off as nuance than even learn the basics).
Zionism is about 50 years older. And there was a minority of about 20% of jews in the 1930s. To make it a jewish majority state, mass settling was performed.