Yeah, you've made that ridiculously stupid statement repeatedly, but you can't explain it!
WHY aren't those 668,000 jobs now open for employers to hire legal American workers to replace them?
Do you admit that you think those business owners will simply close their doors and happily go bankrupt because they now have to replace some workers? How is doing that ANY different than when a worker quits, dies, or retires?
You need to explain WHY you believe that it DOESN'T simply open up the job market for LEGAL workers!
Or, which is most likely, you're simply clueless about how a business operates, which you've shown many times here!