Read the next sentence. It's not bigoted. He's simply pointing out that if you have a team working in English and replace part of it (or add on to it) with a team that can't work in English you'll get crap results. Likewise if you have a product written in English (comments and naming conventions) with English documentation and hand it off to a non-English-speaking team you'll get crap results. This can of course be reversed: if your company is in India writing all its documentation in Hindi it would be silly to hire a Chinese or American team who can't work consistently in Hindi. Etc.
You wouldn't hire a bunch of web developers to write an embedded system in C & assembly. If someone did you'd say that it was idiotic. There's nothing wrong with the web developers, they're great at Javascript, they just don't have the skills needed to do the job.