They're obviously working and helping business and they are taking jobs most Americans don't want. I just don't see a person cleaning toilets everyday as somebody evil as you are wont to.
I've had all I can stands, and I can't stands no more. The argument that Mexicans occupy jobs that Americans don't want is a crock. Around here (Atlanta) all construction is done by Mexicans. Are you going to tell me that before the Mexicans were doing the work that no American would paint a house or hang sheet-rock? No, because that would be untrue. Back in high school I worked many, many hours grilling burgers and making fries. Now, when I go to McDonalds, I have to order una hambergesa, fritas y coca-cola grande just so that I don't have to endure the quizzical look of the non-eglish speaker behind the counter. The reason the Mexicans are hired to do these things is because they can be paid so little. Since they all live together crammed into little apartments they don't need a lot of money. Plus, these Mexicans will work sun up to sun down.
Now I might admire their work ethic, but they are still criminals. Plus, their quality of work ain't necessarily what some might consider "par". If the Mexicans weren't here then those jobs would still be getting done. Employers would have to pay more, but that's how it works in a free market.
My wife works in the emergency room of a local hospital. Don't even get me started on the burden these people place on health care. They go to the emergency room for the sniffles (literally) and then don't pay a dime. What's more the hospital has to hire Spanish speaking staff just to keep things moving.
Oh, geez, and I am sick to death of having to select English or Spanish at every ATM and on every customer service line. I hate answering the phone in my office and hearing "You Speak Spanish?". I could go on, but then I would probably start hemorrhaging.