You said that it mainly seemed to be a North American definition that classed it as offensive. The first definitions I found said it was offensive, and that included the Oxford dictionaries, which I assume is English still. So my point is that the results of an online search were against what...
The first two links on google say it's offensive.
https://en.oxforddictionaries.com/definition/oriental
"noun
offensive
A person of East Asian descent."
I hate this idea that it's bad to be offended on behalf of someone else. All those people are doing is standing up for minority groups, who aren't always in a position to stand up for themselves.
The presumption isn't that everyone in a particular group is offended, the presumption is that some...