To be clear: I'm the daughter,  granddaughter and probably 20 generations over of refugees and immigrants.
 
I think immigration is good, as long as the incomers are few enough not to massively change the demographics, hardworking,  and willing to integrate for the mutual good.

My parents taught me, as they were taught by their parents,  to respect and honor the country we were living in , abide by all its laws (it's part of the Jewish law, btw) and learn to appreciate its culture as much as compatible with Judaism ( French gastronomy takes a special twist when you eat kosher).

It's not foolproof,  but I think it's a good beginning blueprint.