the Zionist movement started long before 1947. it was waged through terror and murder. the UN did not create Israel; there was a non-binding resolution of the General Assembly (as if this has any legitimacy to begin with, but anyhow...)
the portrayal of Israel as a legitimate state that just wants to be left alone, and that the conflict is simply: "one side wants to kill the other side" is juvenile State propaganda.
http://original.antiwar.com/alison-weir/2011/10/10/the-real-story-of-how-israel-was-created/
http://ifamericansknew.org/us_ints/history.html#_edn128
the fact is, people had homes and property, and the creators of Israel, through the use of terror and murder and other forceful means, destroyed lives and property and claimed them for their own.