It sounds like you don't specifically oppose ethnostates, but rather more broadly, any state which contains "the seeds of harm". What test do you use to determine whether or not a state has "the seeds of harm"?
Communism, nazism and nationalism are proven time and again to cause mass death and destruction. Why engage in the stupidity of trying these faulty systems again and again? Nationalism is tied to and depends on ethnic composition existing in a state. Its much harder to induce nationalism in a mixed population.
With israel of course we don't even need to come to such theoretical matters, as the entity was founded by vile terroristic attacks against the very country that granted it the land and naked robbery of others property and it continues today to rob others lands and thus the valid and just response is to shoot the invaders and thieves until they desist as is the right of any property owner to do to a intruder that threatens their life.
You said before you feel Israels actions are justified, so I am asking again, justify the illegal settlers. If not then I hope you have no problem with the land owners engaging in valid self defense.
I'm interested in your very general stance ("seeds of harm") as I suspect it either classifies too many or too few states as undesirable, but I want to let you push your questions too.
No sane (and non-ideological) person will defend israel at every turn. I want to avoid answering your question with a question but I also want to make sure we're talking about the same thing - whose land would you argue israel is settling?
Yes the classification of what is deemed soundly harmful to be allowed to exist goes on a false negative basis as would any such sane assessment be. I do not try to predict the future of every possible system, but it is quite clear some systems are always disastrous.
The people already living there under Ottoman and British rule obviously with suitable legal arrangements deemed agreeable by the former governments. The terroristic appropriation of British administered land just a few decades ago is of course not something anyone of a calm mind would deem as valid so by necessity claims of validity must trace from previous governments. Obviously if it were say a few centuries ago it'd have been not a matter worth doing anything about, time matters. And right now, further other peoples legal lands too, which settlers come at gunpoint and rob. Your state supports the illicit settlers viz the current ongoing expansions by technically non-state actors, quite aside from the state itself being an illicit settlement of course.
I think there are plenty of ethnostates that function well internally, and do little unjustifiable harm to others.
So your question is "how to justify the movement of newcomers into the midst of former residents of british palestine and the ottoman empire"? The obvious initial answer - and I'm sure you'll have a pointed followup which I look forward to and will likely cause me to disavow israel in various ways - is that the lack of any state apparatus there (due to disintegration of the ottomans and withdrawal of the british) creates an environment in which there is a lack of formal resistance to the construction of a new state.
Essentially territory that is unencompassed by anything strongly resembling a state is a favourable place to construct a state.
Why the british withdrew is closely connected as the Israeli/Zionist continuous terroristic attacks against the British and clamping down the Israeli/Arab terrorist factions warring is what was the final straw that broke the camel's back of a country already weakened by WW2. The fact of a place lacking a formal military I hope doesn't make it legal or okay by the some entity to violate their property rights, for the same could be said equally either way for Israeli illegal settlement expansions, for if there is no clear state system there, what's the objection against shooting down the squatters? (Even with a real state existing some countries have things like the Castle doctrine of course, which gives a full legal justification to shoot down the Israeli squatters). The real question that must be answered is if the locals are okay with you arriving, if you came in and legally purchased property or were granted some parcels of land with agreement by the locals, neither of which of course occurred during the violent establishment of Israel. The question of property and territory is very ancient and predates even humans, even animals have a sense of territory. So if you do not respect the existing legal claims by the British or Ottoman governments or claims by precedent of living, then you should be justly treated as an illegal invader. It is a very high degree of naked ingratitude to complain and start attacks against the Brits for controlling their own border and restricting immigration to their own lands, behaving as if these random Poles and Russians literally own the place. Would you support random Poles or Russians performing terrorist attacks against America if the USA instituted a strong and limited immigration quota upon them? Because that's what happened in the region of Israel back then. I completely understand the Holocaust but that gives a person no right to go ahead and rob at gunpoint an unrelated entity's land, moreover launching attacks against a country that bled so much fighting against nazis.
You're branching off in a lot of directions. Is there a specific point you'd like to focus on? Do you agree "territory unencompassed by anything strongly resembling a state is a favourable place to construct a state"?
With israel of course we don't even need to come to such theoretical matters, as the entity was founded by vile terroristic attacks against the very country that granted it the land and naked robbery of others property and it continues today to rob others lands and thus the valid and just response is to shoot the invaders and thieves until they desist as is the right of any property owner to do to a intruder that threatens their life.
You said before you feel Israels actions are justified, so I am asking again, justify the illegal settlers. If not then I hope you have no problem with the land owners engaging in valid self defense.