Yep kosher BOB food is available on EZY TLV flights. (halal on certain other routes).
I haven't operated a TLV but from what I have heard, EZY are well thought of by the Jewish community on the LTN service. Totally hear say and anecdotal but apparently LY aren't particularly liked not least because they won't allow prayers to be made around the aircraft.
I'm not sure whether EZY will go out of their way to put more make crew onward but I think at least one will be on the crew. Those who aren't aware should note that orthodox Jewish culture doesn't always make onward service for female crew particularly easy.
As a side the recently suspended MAN-ZRH service had a lot of Jewish pax.