I have come across a lot of people for who English is the first language and their grammar, more often than not, leaves a lot to be desired. However, whenever these same people hear me speak, they tend to assume that I cant speak good English based on my accent.

Why do white(?) Europeans think that they know everything better than everyone else? Why do they have to always consider that they know everything anyone who is different or has different thought systems has to be inferior?

English is not even supposed to be my first language but many of these people will fail woefully if they were to sit an English test marked by those who taught me English. I wonder how they pass English in schools.