How can you think that by helping people (legal or not) you are doing something wrong? USA is a country that has a massive problem with not accepting what it is, what it has, and what it could have. But then again, a country is made of diverse people. I feel happy that some people in California feel that they need to help and support those who are most vulnerable and mistreated by the system.
The poor living legally in your country ARE NOT competing for resources with "illegal aliens" you call them (I find it absurd to even consider a person, a HUMAN BEING, to be illegal, but that's a different topic). Your country has way more resources available than those dedicated to eradicating poverty.