"Been to LA lately? It looks like Mexico City." 

As you probably know that part of the country used to belong to Mexico.  There are people of Mexican, Spanish and/or indigenous (mostly a mix of all three) heritage that have lived in Los Angeles for probably longer than your ancestors have been in the US.  If you are so concerned about those who are there illegally then a simple solution is to make many legal and stop the rest from illegally working by going after employers.

"Nazi card" <-- See what Hotubjoe said below.  (Thank you Joe).  To add to this, the tactic they are using is a waste of money.  Who harasses a 10 year old girl on public taxpayer money?  Ridiculous and if you cannot see that you have some serious thinking to do.