You're one of the richest countries in the world, with a large mass of brains to pool ideas and scientific research, but when religion comes in the way of that, I find that insanely disgusting.
Funny thing about that, a lot of researchers come from outside the states to study at the universities here. It goes a long way towards keeping us competitive in that regard. Our own lab has been about half native-US over the last few years, with people from India, China, New Zealand, etc. rotating through. From my own anecdotal experience it can be fairly rare to see a good paper published with the author list entirely made of U.S. born citizens.