All of the Jews who ended up immigrating to Israel from Arab nations were ethnically cleansed from their areas of origin. All of the Jews whose homes have been taken from them by the Arab League in 1948 ( on the West Bank) to make room for Moslim-only settlements in the West Bank and East Jerusalem have been ethnically cleansed.

[G]enocide means any of the following acts committed with intent to destroy, (Stated purpose of Hamas, per it's charter) in whole or in part, a national, ethnical, racial or religious group, as such:
(a) Killing members of the group; ( suicide bombs, rockets, morters)
(b) Causing serious bodily or mental harm to members of the group;(ditto)
(c) Deliberately inflicting on the group conditions of life calculated to bring about its physical destruction in whole or in part; (Mass area bombardment by rockets )

Hamas is attempting genocide.