The fact that you can't seem to distinguish those two things, and project that the rest of us can't, might go towards explaining some of your confusion, no? Perhaps you've heard the phrase "correlation does not imply causation"?
Well, I know a Canadian with arab origins, a biochemistry doctor, who has been totally humiliated when going to an american lab (I've never has to be naked when goind to US, why him?). He is still (doing a post-doc in US). He have to present himself each month somewhere and the only airport he can go in is in another state. This is pure racism and paranoia thx to your goverment.
I'm sorry, but the guy you're replying to is right. You may not suffer from xenophobia, but it's obviously not the case for everyone; as in X-Men;)
And all this paranoia in airports it's so funny. The crash in pensylvania 9/11 showed that people will never accept again to lose control of a plane. They add doors to protect the pilot: fine. They add false passagers to protect the plane: well, it begins to be a lot. And they piss off everyone in airports: come on. One thing is sure, if there's another ambituous terrorist attack, they will use something else. A bomb in a nuclear facility, poisoning people, I'm sure there's a lot of possibilities. Seems to me that US doesn't have the budget to waste unusefully so much resources on security. I guess I have a totally different culture than the average american, 'cause I don't understand at all how people can accept that there taxes to be spent on stuff like www.ready.gov.
Regards,