Actually it was the League of Nations that allocated the land to the Jews in the 1920s, when Britain was handed control of this Mandate with the aim of facilitating the reconstitution of the new Jewish National Home. Stop denying history.
Yes, refusing to allow themselves to be killed by their neighbours does indeed make Israel very bad neighbours...to their enemies. These days the Israelis can fight back. And they haven't "moved in" as Jews have been living in Israel for around 4000 years.