You can scale the Israeli system with personnel. What you will have a hard time with is having enough trained personnel. Amd you will never duplicate the Israeli mindset. Remember that everyone working airport security is military trained. And that they know the threat they face is real and is a threat to their very existence. Some of their techniques are very good. They don't just question the people fitting the profile. It is not ubusual for them to pull grandma out of the line, so that hidden observers can analyse the response of the people around her.
The most important part of their model is that security is all encompassing in the airport. Not just at a chokepoint. You are being observed and questioned while waitng to check in, at passport control, and observed after you have entered the sterile zone.
It's great, but would cost a fortune.
well, they don't hire clowns either... or mall cops, or wannabe mall cops...