> Sam Harris advocated for profiling and security expert was not.
I don't think "profiling" by itself quite captures what Harris was arguing for. He was arguing for profiling based on a characteristic--being a Muslim--that can't be directly observed. This was a key point of Schneier's rebuttal. So Harris's version of profiling isn't workable even if we admit that the characteristic in question does increase the probability of the person causing harm.
The profiling done by police does not have the same problem, because the characteristics involved are visible. However, visible characteristics are not limited to the ones you note: they also include behavior. So your statement that visible characteristics like age, gender, ethnicity are the ONLY ones available to the officer is not correct. The officer also sees what the people are doing and whether it looks suspicious, the people's body language, and so on. It is not unfair to single out people for their behavior.
I don't think "profiling" by itself quite captures what Harris was arguing for. He was arguing for profiling based on a characteristic--being a Muslim--that can't be directly observed. This was a key point of Schneier's rebuttal. So Harris's version of profiling isn't workable even if we admit that the characteristic in question does increase the probability of the person causing harm.
The profiling done by police does not have the same problem, because the characteristics involved are visible. However, visible characteristics are not limited to the ones you note: they also include behavior. So your statement that visible characteristics like age, gender, ethnicity are the ONLY ones available to the officer is not correct. The officer also sees what the people are doing and whether it looks suspicious, the people's body language, and so on. It is not unfair to single out people for their behavior.