"We are not trying to profile wife beaters, we are trying to profile people who want to hijack Aircraft."
So you are saying that there is something about a hijacker that makes is possible to profile them but makes it impossible to profile a wife beater?
Could that something be .... Muslim?
If not, then please explain how the wife beaters evade profiling. And what is to prevent the hijackers from using the same techniques as the wife beaters.
"Completely different issue & profile."
But if it works then it works. And if it works then it should be easy to demonstrate by going downtown during rush hour and identifying men who beat their wives.
"Actually, this is incorrect."
No. It is correct. You keep referencing things that you find scary and then extrapolating to define those things as threats.
Like the tarantula example, scary looking is not a threat.
Like the wife beater example, not scary looking can be a threat.
"The Israeli's do this in their airports."
You should read Bruce's website more often.
The Israeli method has been discussed and analyzed here many times.
First off, it does not scale. The entire nation of Israel moves fewer air travelers than a single airport in California.
Secondly, the Israelis use "behavioural profiling" rather than "does this person look Muslim". This allows them to catch instances where the person is not even aware that they are carrying a bomb.
Thirdly, the Israelis start their security process outside of the airport, on the approach to the airport.
Lastly, as Israel demonstrates, when a terrorist sees that airport security is more difficult than blowing up a bus, the terrorist will switch to the easier target.
It is easy to claim that method X will stop Y when the odds against Y are millions to 1.
But if method X really worked then it should also work against A and/or B and/or C.
Domestic violence is a lot more common here than terrorist attacking planes. If that method worked then it should be able to identify men who beat their wives.
Or you should be able to explain exactly why it would not work.