> You obviously know nothing about the layout here. They already have built their own > communities here, since day 1.
As did the white American's 200 years ago. You can either repeat the process and become the new Native American's, or figure out a way to get along.
It's not the first generation you need to worry about, it's the children. If you can get them to integrate then the future will be ok. If you keep banging on about how immigrants are evil then the parents will make sure that their children hate you too.
You managed to mess up relations with the blacks by bringing them into slavery and then even when that got abolished not letting them into the same places as white people. So I can understand why immigrants would build their own communities, America appears a pretty toxic environment for immigrants. Not everyone is racist, but it's enough of a problem that it will perpetuate until something big is done about it.
The same problems happen in the UK, but we've managed to deal with it a little better. We still have a long way to go though.