I don't agree that it's no less an example of bigotry; what we're talking about is essentially negative profiling. In other words, the guy who's dressed like Osama bin Laden, and Sam Harris, and you and I, presumably, should all be given scrutiny at airport security. However, the 80 year old japanese woman can safely be let through security, because it's a safe bet that she is not going to attempt to take control of the plane or blow it up. That's all that's being asked for here. Searching her is an act of security theatre, and there isn't time to give full attention to everyone in line.
Here's the question put another way: let's say you're in the airport security line. Look around. Is there anyone you'd be willing to bet your life isn't a terrorist?
If it's me, the answer is yes: about 20% of the people going through airport security, I am very confident are not any sort of terrorist, for a variety of reasons. I would prefer that any resources that were going to be put towards searching those people were instead directed at the 80% I think are more likely to be a terrorist, even though they're still really unlikely to be such. And I'm not even trained in what to look for.
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