Ireland and China are not adjacent countries.
We don't share a border with them. There is a strong political viewpoint in the Mexican national population that they should be here because the land belongs to them; that it was taken from Mexico and it's fair game in their eyes. The Aztlan movement being pushed by La Raza, MEChA, and other groups are part of a front being supported by the Mexican government to militarize the vast hoards of Mexican nationals colonizing our country. Once the demographics reach critical mass, an insurgency will begin to create a Greater Mexico. This slow motion train wreck is happening before our eyes, and most people seem like they could care less. The "it could never happen here" crowd seems to be in total control.