It has always been more acceptable for someone of a 'lower' class to move "up" than the other way around. So that might explain why you would see SOME Arab Palestinians and Christians living in Israel. Still, the "goyim" among them would not likely be seen or treated as well as one of their 'own.' In fact, there are several verses in the Torah that indicates as much... with regard to slavery only being allowed to own or treat non-Hebrew slaves "harshly", and only allowing usury when dealing with non-Jewish people, etc.
Likewise, it would also be less likely to see Israelis living in what they would see as a 'lesser' country or among outsiders, especially knowing that the 'outsiders' have not been treated so well by Israel or Israelis as a whole.
"In modern Hebrew and Yiddish, goy (/ɡɔɪ/; גוי, pl.: goyim /ˈɡɔɪ.ɪm/, גוים or גויים is a term for a gentile, a non-Jew.[2] Through Yiddish,[3] the word has been adopted into English (pl.: goyim or goys) also to mean "gentile", sometimes in a pejorative sense.[4][5][6] As a word principally used by Jews to describe non-Jews,[5] it is a term for the ethnic out-group.[7]"