never gonna ride northwest airline anymore

I am so pissed with northwest airline. Especially the northwest in Shanghai. They are so disciminative against nations.. just because I'm a citizen of a country that the majority of people is muslim, why do they treated me so differently. First of all, at the check-in counter, my baggage hadn't even been scanned, but they already ordered me to open it and let them take the things out one by one, checking each things I have in my bag. I asked them why did they do that, they said that it is usual to have some people being checked like that. Then I look around me and I saw the other girl who was being treated like me is another foreigner which has the same case with me too, while the other passengers could check in without being asked to open it. Secondly, when I boarded the plane, I was taken to other side while other passengers passed the corridor just like that. I was fully scanned, I had to take off my shoes, stretched my hands. It was so uncomfortable. At least they put a piece of partition so people couldn't see us, but it felt like I was treated like a criminal. Of course they wouldn't find anything suspicious, I didn't bring bad things with me. I am so pissed not only that they didn't treated me well, they didn't even apologize for the uncomfortable things they had done.