a young Arab male wearing a bandana would be looked at more closely than a 70 year old rabbi
I used to fly regularly to Larnaca from LHR on the evening flight. There was an El Al flight at about the same time, so their passengers were going through at the same time. One evening, the rabbi in front of me had a full set of ceremonial circumcision knives in his hand luggage, needless to say they had to go in the hold