Really have no idea? Some of us have gone through both domestic and international flights in Israel more than once. Some quite recently.
I,m sure you did, so what?
1st, there is an equal number of flights from Israel and to Israel every day, and since none has been blown up recently we have no proof that airport security in Israel is any better than in any other country.
2nd, while Israel is a small country with a small number of airports, and probably they can organize a small force of smart and highly trained security professionals who rely mainly on their judgement, in US the TSA can't do that since they need a huge herd of agents. Since in US any smart ex-military types would rather work for Blackwater and its clones, or maybe FBI/DEA/police, all TSA can do is assemble a line of human robots who blindly follow their Manuals and SOPs.
3d, even though human judgement can be beneficial for a mass traveller, this judgement can also be stupid, irrational, and harmful in some cases, and Israel is no exception. Back in the early 00's, I worked for a big biotech company that at some moment found that the Israelis dumped all international packages into a field at the airport. They kept all shipments there for a week during which time any bomb(s), if present, supposedly would have exploded (?!). Needless to say, any biologicals were rotten in a week, no matter how much dry or blue ice was packed into the styrofoam containers. This does not strike me as an exemplary brilliance in fighting terrorism. Then, while working in Egypt, I spent some time with a tech rep from a known European company that makes medical and research equipment. He told me that though his service area includeded most of the Middle East, he could never enter Israel from Egypt or Jordan or any other Arab country; he always had to go back to Netherlands first. This was a big inconvenience for him, and made me wonder why this guy who looked like Greg Pitts' twin was either welcome or unwelcome, depending not on who he is or what he looks like, but on where he was coming from. So, given a choice, in the age of mass paranoia I would rather rely on some government's SOPs and Manuals than on some @sshole's judgement (though I would prefer none of the above).