Have you even read the actual legal text [1] for the Nation-State law? It basically just says that Israel will always retain certain elements of Jewish culture such as the flag, anthem, holidays, and official language. No one is preventing non-Jews from partaking in those cultural artifacts, just like how no one is preventing Mexican Americans from celebrating the 4th of July and no one prevents them from speaking Spanish.

Is every country now required to sing Kumbaya and officially honor every major culture within a 1000km radius? Can they not officially declare that certain cultural things are more important to them than others?

[1] https://en.m.wikipedia.org/wiki/Basic_Law:_Israel_as_the_Nat...