At the grass roots level when public legislated policy does not work, here is what each of us can do, especially if you live, shop, or work in an area with many immigrants.
An encounter with an Afghan asylum refugee at the supermarket, learned she was of a doctor's family before escaping her country. Here helping her with her limited English find a couple of products on the grocery store shelves.
At a multi family yard sale at a nearby community center, saw someone who clearly came from south of the border themselves or from their family lineage in their appearance and accent stealing small items from a couple of tables. So not to further feed the evil, those couple of people selling closed up shop pretty quickly.