I think criticism is a lot easier to take when you feel the other person is on the same level, as in, they can speak another language than their own. When someone fluent only in english mocks my english spelling, I feel a little urge to say "If you dont like my english, we can continue in german or french!", you see?I just found your remark regarding the fact that your use of English was criticised (or rather mocked) by a native speaker of that language totally ridiculous.
Also, I dont see how this reputation has anything to do with my alleged "anti-americanism". Im pretty anti-american on certain issues, but I like to believe my attitude is different from the general "omfg I hate dem americans!!" which has become so popular lately. You're free to correct from wrong, as ever.
We can make a thread with a vote for our american friends to see how bi- or tri-lingual they really are and if in the end I have to change my opinion, if you want. Until then, they will keep their reputation on this. Yes that's prejudice, and yes Im comfortable with that.