I agree that there are many English users out there with a good level of English. For younger students and beginners they are often very good teachers. However, even good users make mistakes. Take you post, in one part you said: ..."establishemnt in Asia has failed to recognise"...
which has a spelling mistake (probably a typo) and a grammatical error. When you are teaching more than the basics, you should teach *good* English, and *good* grammar, without these mistakes.
If I were to learn another language I would want a "NATIVE" speaker to teach me.
You said that it is an international language, which is correct of course. However, just because people use it doesn't mean they are qualified to teach it.
Having said all of that, I agree there are lots of native speakers that don't use the best grammar and don't have the best spelling in the world.

> It's becoming a thing of concern that many educational establishemnt
> in Asia has failed to recognise other nationalities who have good
> command of english language . I think english is an international
> language .Therefore, it doesn't belong to any country : America,
> Canada, Australia or Britain.
> I have been in China quite a time now, I have come in contact with
> good teachers who have good command of english and they're not from
> the so called native speaking's countries. And as well, I have come
> in contact with bad teachers who are native speakers.
> So , we should accept the fact that english does't not belong to any
> country .Other nationalities with good command of the language should
> be given equal consideration . Afterall , it's a world of all. Or
> ,what do you think about this ?

> Thanks.