So if you are unskilled or semiskilled worker you pretty much deserve to have your wages driven down and available work taken from you by illegal invaders?
As for "qualified to be foreman", the main qualification is the ability to speak Spanish.
As for the "illegal" part, you already read the part where I said I oppose illegal immigration, but support legal immigration. If you have trouble reading English, improving in that area will open up some real prospects for higher pay. As for "qualified to be foreman", the main qualification is the ability to speak Spanish.
...which can be learned fluently in about three months, especially if you befriend some of your Mexicano co-workers. It can't be the only qualification, or every Mexican would be a foreman by now.