Lol, no they aren't the only ones. The United States, Canada, Australia, and in part South Africa did the same. : /
not the same because colonists in those places eventually granted the natives their rights whereas israel continues to disenfranchise arabs while portraying itself as a victim.
Perhaps I am mistaken, but my understanding was that Israel was "the promised land" that their god promised his "chosen people." That is how they justify the expelling of the Palestinians in 1947. Correct me if I do not have this correct.
most of the zionist founders weren't religious and israel has never officially recognised that any expulsion of palestinians took place let alone attempted to justify it. it maintains that they left of their own accord after invading arab armies told them to get out of the way and people actually believed this until the late 80s.