"many of my friends who used to be able to get work in construction, services, etc."
It's always "my friends.." isn't it? Well if your friends can't find work in this tight labor market there is something wrong with them. Do they perhaps sit around bars all day whining about Mexicans while their wives are waiting tables to make their truck payments? Your "friends" are lazy losers.
"What's to be jealous of? "
Real men who are willing to leave their families, travel thousands of miles and risk their lives to support their families. Real men who don't mind doing hard, dirty work in the hot sun, and giving it their best effort. If your "friends" were half the men that most Mexican laborers are, they wouldn't have any problem finding work and keeping a job.
"make me despise those who are actively contributing to a downward spiral of civility in my own country"
We're back to xenophobe now.
"Legal immigrant? Yes. Illigal immigrant? Get real. "
Then you should support President Bush's proposal to make them legal. You would then have no problem with them.
"What higher quality is that?"
I'm sorry you are not participating in the greatest sustained era of prosperity in our nations history, but blaming immigrants isn't going to change your situation. Don't look to the government to solve your problems and you won't be disappointed.