'Q': "Illegal immigration has become a hot political whipping boy because it arouses the inherent paranoid-......"

Well, because Obama just overstepped his Presidential powers to do what he did, to gain vote. The 'Separation of Powers' prohibits the president from doing what he did, and not running it through Congress. The whole rap about people re-acting accusing each other of 'bigotry' is just the emotionalizing of something that was done illegally, by one guy, rather than through the 'Representatives'.
You're right though, the issue is employment..he SHOULD be doing something about it, right?..OK, explain how opening all that up, for UN-documented workers, here illegally, helps American citizens, who pay his salary?....and they don't get a say in it??

GfS