firstly,
-I can't tell the difference between Korean, Chinese, Japanese, Tibetan, Vietnamese (and others) people readily, they have a similar skin tone (and other physical features)
-I can't tell the difference between Indian and Pakistani people, they have a similar skin tone (and other physical features)
-The two groups mentioned above, however, ARE distinctive from eachother
-So it's a problem if you use the same term "asian" for both of them

secondly,
-I said "political correctness" is calling people what they want to be called
-you said political correctness is just some term white people use to dismiss stuff, and that you should call people what they want to be called.
-Does that seem somewhat circular to you?

thirdly,
You DIDN'T break down what's wrong with "oriental"... other than you don't want to be called it. And if you maintain that you did, I ask you to repeat it for my sake

fourthly,
I wouldn't call someone something they didn't like, to their face
but if I've got an acquaintence from India and a friend from China, except I don't know their exact nationalities, then I am going to say "asian" and "oriental" to describe them (or maybe far-eastern or east easian interchangably)