Maybe you’re not doing the math on the age of the average Israeli person. There’s been more than enough time since the creation of that country for multiple generations to be born there. They don’t have some other country to go home to, because that is their home.
If they can’t return to the country of their or their parents origin, then they need to go through the process of becoming legal citizens of Palestine.
Having kids their does not entitle them to the land they were born on. Russia has occupied crimea for 10 years now, there will be thousands of Russians that were born there. Does that mean Crimea belongs to Russia? Does that mean Ukraine calling for its historic borders to be recognised is genocide?
You do know that the ancestors of many Israelis are native to that area, yes? Why do they have less rights to the land and their culture than the other groups who live there?
Other than the few that lived their during ottoman rule the vast vast majority of Jews immigrated after the mandate. So the only way they have ancestors that are native is if you go back some 2,500+ years.
And if we want to do that than anyone can trace there ancestors back to Africa and you can excuse European colonialism in Africa the same way you are excusing Jewish colonialism.
