Thoughts about immigration and adopted identities

Having lived most of my life outside the country of my birth I often have thoughts about this.  For many people, group identity is a matter of importance.  Here in Israel/Palestine I have seen many newcomers go to great lengths to integrate into one or the other society.  Some people also seem to see a deficiency in their original identity, and try to adopt a new identity even without really needing to on a practical level.