The cultural left doesn't take its marching orders from the corporate world. They are more than capable of calling people racists on their own. They don't need to be told to do so.

I think it's more a congruity of interests. Both the cheap labor lobby and the 'anti-racists' support undocumented immigrants. But their reasons are very different and it's kind of a shotgun marriage. I think it's less that they are working in tandem and more that they are both doing their own thing and those things happen to coincide.

But you do sometimes see them borrow each others messages. Rick Perry saying 'you have no heart' was a watered down version of 'you're a racist.' And a pro-immigrant leftist saying 'but they help our economy' is a watered down version of 'cheap labor is f-ing awesome.'