The fallacy of this never ending debate is kinda displayed when there's stories in the bible where God tells the Jews to displace the Canaanites and take their land.
DNA tests show that their ancestors mostly have the same markers found in southern Italian or Sicilian populations.
If a Japanese converts to Judaism, can they claim that their ancestors used to live in Israel? Well, the same logic applies to the European Jews that moved to Israel. They then convinced Jews that are actual descendants of the Levant populations to move to Israel with them, but the first settlers didn't have Israeli ancestors, or didn't have more of them than any other Joe Schmo from Southern Italy
Judaism is - mostly - not a religion of conversion, that's why it's always complicated to separate the religious aspect from the ethnic side when talking about 'Jews'.
Even if the ancestry is muddled in millennia of mixing with other local populations, I suppose most Jews can still claim that they descend from Israeli ancestors at some point, and it makes sense.
Although I'll be the first to admit that what happened to first Nations and indigenous populations during modern colonization is completely unfair and the reservations system is completely broken and it's recent enough that it's perfectly fair for them to fight it, but claiming you're owed a piece of land because your ancestors (allegedly) got kicked out millennias ago? Nah.
Native Americans south of the us-mexico border stop being native Americans once they move out of the ejidos (aka communal community and the closest thing to a reservation in Mexico) and the ultra fine gradient that separates a Mexican from a native American is too fine for the American and Canadian systems to handle.
It's especially galling in my situation because DNA says I'm 75% native American but I didn't qualify under the American system (Canadians have a similar system) which means I can never access to the healthcare, education, and housing aid due to the simple fact that Americans genocides the people I descend from them out of existence on the American side the border; but left them mostly alone on the Mexican side of the border.
Compared to other religions, conversion to Judaism is quite complex and sometimes not allowed at all. The proselyte culture is a lot less developed than for other monotheistic religions.
Yeah, I'd be inclined to agree with your last point too. Especially when you consider the Holocaust, and how the Jews were forced to relocate or die. It's like what do you want them to do in that situation.