To be fair (and as an immigrant I was also appalled by PG's logic), he qualifies his statement by saying that he considers it a problem when the accent makes it difficult to understand the person. I think that's a reasonable bias, but a bias nonetheless.
It's a bias to not want to back a startup because you can't understand the pitch due to a language barrier? I think it's pretty reasonable to say you should be able to speak the native language of a country intelligibly in order to successfully do business in that country.
