hahahaha, guys you care too much about immigrants.. they are here and they have come to stay... and they'll bring their families over once they get a "choza" and a "laburo".
I'm from Argentina and we've been living with immigrants from Peru, Bolivia, Paraguay, Venezuela, China.
This last years I've seen more immigrants out there every day... sure I hate this but it's something that can't be helped. You can't deny the seek for a better future to this people, they deserve it as much as you do, and they come from another country where they did not have a good future (or present).
Don't worry... it only appears they bring doom, but in fact immigrants are always very VERY careful on foraign lands, respectful and kind (well most of them), they can't afford to screw the only exit they have to their problems.