it doesn't matter if they belong or not... that is like saying people from china are not allowed to be in America because they are not mentioned in the bible some people in America read/follow. So really anyone can be in there no matter who it belonged to in the begging, it is just the matter of them settling who goes where. Or even just mixing
I believe that the Palestine should have the land. because they were there first. One website claimed that “If we go back to the late 19th century and the early 20th century, the Arabs were in Palestine first.” And just because the Jews had the land because of the way they had been treated doesn't make it owned by them.