There is a reason they didn't take the legal route. Because it is easier to walk across the border. You can bring drugs, and you don't have to wait your turn like everyone else. It is the same reason why so many people illegally download music. It is easier. They probably can afford the cost to pay for all the songs legally, but downloading them via limewire is easier. Those who buy music legally are like legal immigrants. We are against illegally downloading music because we waited our turn and legally got our music (or immigration). We will go on to be productive Americans. If hordes of illegal immigrants, many of them rapists, murderers, drug traffickers and unskilled workers come into the country and continue to drag the country down.
Roughly half of Mexican immigrants are illegal. That's still a lot of people coming here legally.
I know you never convince anyone of anything on the internet anyway, and that arguing about politics is usually pointless in real life, let alone on the internet, I just get these urges to spew my spiel.