From my anecdotal experience, El Al has security personnel that appears trained to a naked eye, but in reality is extremely ineffective, flawed, and unethical. I had the misfortune to go through El Al security four times. These all occurred in a span of two weeks, roughly in the same circumstances (I had to fly into Israel, fly out, fly back in, and fly back out). I can tell you that the outcome of their screening is heavily inconsistent and highly dependent on the prejudices of the particular agent doing the interview, and not necessarily on advanced training procedures.
I had the same answers for their questions every time. Two of the times the agents were Israeli jews who immigrated from Russia. Since we share a common background, both let me pass after very few questions because my trip details seemed perfectly reasonable to them. The other two times, I was interviewed by jews of clearly middle-eastern descent - both had no understanding of my cultural background, and both thought my trip details were extremely suspicious, subjecting me to a detailed search. So the outcome of the interviews was effectively random, which means they might as well perform random searches.
The interviews were highly unethical, inappropriate, and degrading. Even more importantly, they were completely ineffective, resulting in a random outcome highly dependent on each agent's personal prejudices. I don't know what good security looks like, but I can tell you that this most certainly isn't it.