You made the assertion. You have the burdemn of proof.
Submit your evidence. I won't hold my breath.
It took me less than 5 minutes to find this:
http://www.freerepublic.com/focus/f-news/1607072/posts
Majority of Americans support a guest worker program. In fairness, there were other polls with different questions suggesting that Americans also want tighter enforcement of immigration laws. But there was no poll indicating any substantial support for treating these people as criminals, rounding them up, deporting them, etc.
In such a small amount of time I was able to blow your "80%" assertion out of the water.