Low cost flights to Israel (and El Al flights) are notoriously busy, loud, and full of badly behaved people (and children). If you hate screaming, badly behaved children on flights, I suggest you take a flight that involves being in the air sometime during the Sabbath or another religious Jewish holiday. It won't guarantee a quiet flight, but it'll greatly improve your chances.
Alternatively, flying with a more expensive airline will cut down some of this mess too. If you fly with one of those on a Sabbath, you'll probably have a pretty good experience.