What about the Israelis in the Old Testament? They might take exception to your statement.
AFAIK, they didn’t use the term “Israeli.” They referred to themselves as Israelites.
Possibly this is nit-picking.
But I stand behind my point that the legitimacy of a “nation” or its control over a particular region needs to be argued on other issues than the date of origin of the “nation.”
Another point. The Israelis claim the “right” to the land based on their conquest of it under Joshua and the judges, during which they largely wiped out the previous inhabitants.
On what non-religious basis did this conquest confer legitimate title, but all later groups that conquered the area did not acquire proper title to its sovereignty?