The Jewish people are an ethno-religious group that has roots in what is now Isarel. In fact, Jews practice many different religions that vary far more than, for example, Sunnis from #####es or Catholics from Protestants.
The Israelis also bought the land prior to 1948.
You'll notice this map of Jewish land ownership lines up very closely with the proposed border in 1948, with basically the addition of land in the Negev dessert, which is largely uninhabitable:
The idea that they just wedged a random Jewish country into an Arab one is a myth. The Jewish people already owned that land. The proposed borders weren't just random.
Do you know who does get countries? Countries that win wars, and more importantly countries that already exist. That's right Israel already exists.
And BTW the Sikhs are a very poor example. They too are largely an ethno-religious group based in the Punjab. They formerly had their own country. Large portion of Sikhs want their own country, and there's been largescale oppression of the Sikh people. And until this latest round of fighting in Gaza the insurgency in Punjab had claimed more lives than the Palestinian/Israeli conflict:
https://en.wikipedia.org/wiki/Insurg..._Punjab,_India