From the comments:
There are no jobs American workers will not do if market forces are allowed to work properly.
Illegal alien labor is akin to slave labor. You may get a cheaper car wash, but you pay for it with higher taxes and deficit spending to build more prisons, treat more diseases, and deal with associated social unrest caused by lawlessness.
The real social cost of your cheap $5 car wash is probably $15.
Those who hire cheap illegal alien labor are really thieves stealing from the public treasury to enrich themselves. Those who advocate for amnesty are thieving from society.
WE have discussed the Tragedy of the Commons many times here before, and this is a perfect example of the phenomenon.