Illegal aliens are immigrants that come from wherever and enters another country illegally. This can be done by entering illegally or violating the terms of their visa, permanent resident or refugee permit. Not ALL illegal immigrants are from Mexico, but the majority residing in the states are. This problem is not just found in the United States, but all over the world. Most natives of said country are suspicious illegal aliens will take their jobs, but most are unskilled and work labor jobs for long hours and little pay.
Illegal aliens come from all around the world, in just about every country. Not all of them are lazy, resource sucking pieces of shit. Most are hard working individuals who just want to give their children a better life. But, something has to be done to stop so many from coming over at once into the US.