As someone who was born in America and then moved, I wouldn't find it offensive, but I would find it odd and ignorant of the different cultures. It's odd that you choose to defend your idea of blobbing all English speaking countries by pointing to a somewhat-blob of China. There is a difference between the two. With the China blob, the people are in the somewhat same regional area under the same management. With your Anglo-blob, we have peoples split by vast oceans with different cultures, different governments, different histories, etc.
I still believe the Chinese blob could be solved with just one minor change, but overall, it's a much better blob than an Anglo-blob.