In the modern world, if you accept universal human rights, every minority in the world has to accept that it's a minority, and every majority in the world has to learn to accept the minority. In addition, everyone is a minority is some sense and somewhere - depends on your worldview.
What you're saying is a very condescending (and frankly antisemitic) claim - that Israelis (or Jews) are somehow "special" in being so stupid to never accept this. Of course they can accept it, just like everybody else in the world learns to accept there are other ethnicities and races. Americans, for example, learned to accept it. Likewise, all Jews outside Israel have accepted being a minority. It's not really a problem that racists make it out to be (at the end of the day, people individual differences and conflicts trump most group differences).
> When Israel was "a single biethnic country" this was the norm
That's why modern biethnic countries have laws and other systems that prevent that - see my comment above. A good example is Belgium. The point is, you can change the perception from 2-states to functioning 1-state without having to give up anything related to each ethnicity's cultural heritage. Has been done many times in history.
Okay, so in your opinion, there is exactly one state that is currently engaged in a civil war. How would world leaders telling them "You are actually one country engaged in a civil war" stop that war?
The Jewish minority in that case would not accept living in a muslim arab state since they consider Israel to be the sole refuge for jews in the world, the only place in the world where they don't have to be a minority. The muslim arab majority would not accept a jewish minority living within them, they consider them foreign colonialists that need to be purged (and you may have heard of one or two groups currently leading those muslim arabs that have that exact official position).
> You need to bring some argument.
When Israel was "a single biethnic country" this was the norm: en.wikipedia.org/wiki/1929_Hebron_massacre (picked as an example because of the "humour" of having to disambiguate it from https://en.wikipedia.org/wiki/1517_Hebron_attacks ) no one thinks going back to that is viable.