Man, there's a lot to this.
1) Acting willfully blind to the threat posed very specifically by young males of ME descent is absolutely crazy.
2) Unless everyone is at an 'equal chance' of being searched, the young males of ME descent have a foolproof way of smuggling weapons on board--by threatening or blackmailing oldsters, white females, kids, whatever to smuggle the weapons on as mules. That's what I'd do if I was a bad guy and had an idea that certain folks won't be searched.
3) No 'zero tolerance'--use a little discretion, not in searching everyone, but in charging and actually punishing people for breaking the airport 'security' rules.
4) Any searches of passengers and flight crew is an absolute waste of time because of the lack of security attention paid to the ground crews handling food, baggage and maintenance. So you may as well just search young males of ME descent because the really motivated ones will get weapons on anyhow.
I can think of a number of older folks who can defend themselves quite well and are also saavy enough to pretend to be impotent until the youngster is stupid enough or not to let down his guard.