It's flabbergasting to me that people who they or their family came to this country in order to seek work and find a better life are clamoring to stop other people to do the same as soon as they sense they are about to get their take.

It's as if they are essentially saying "don't treat us like we want to treat the ones who want to come after us on our footsteps".

It's a very selfish view of the world and it lacks the empathy that you are asking from others to give to your plight.

Never mind that most likely it's bad economics predicated on wrong Malthusian understanding of the world. In a market economy, jobs aren't finite. A job creates its own demand.

What separates the US economy from let's say the Guatemalan economy is that the US economy has a better set of institutions which in turn allows respect of property rights, makes contracts enforceable and allows entrepreneurship to thrive. The same Guatemalan who can't make it in Guatamela because of corruption, fear of getting robbed and job killing regulations can make a living in the US. Conversely, if the whole world could magically adopt and enforce US rules and regulations in their economy, it would thrive dramatically. Alas, that's impossible.

I think that the best arguments against illegal migration are cultural not economic.

But like I said, if you are against more illegal immigration -for the people after you, not yourself- at least don't be a jerk.