Do you realize now how rude your post sounds after I changed it? What does the intellect level of the Taiwanese have to do with them wanting to practice English with you, just as you want to speak Chinese with them?
This is not rude and on many levels other foreigners as well as I wonder about their intellectual level. One might argue that don't care about other countries which is fine but they seem to lump all foreigners together. It is not just that some white person may not speak English. It is that they think all foreigners are American and all Americans seem to think alike. Of course there are some intelligent Taiwanese people and for the most part they are friendly but there over simplification of the world is sometimes naive.