The vast, vast majority of tech engineers that I talked to who are from the United States are very supportive of bringing in people from other countries because they want to work with the very best."
He's right, I have said that. Of course, I always follow it with "but only if they have unrestricted visas that give them the same freedom I have to shop the market and work for whomever they want", and I suspect everyone he's talked to (presuming he isn't making it up) have said something similar.
Because when the best of the best make $200k a year, it kicks the wind of out the whiners who complain about the the average programmer salary. But when they work for $80k and they can't switch jobs, that depresses my salary, and that is precisely why lying fuckwits like Joe Green and Mark Zuckerberg want to bring them here.