If Israeli Civil Aviation Authority permits passengers in the cockpit in airspace not regulated by another CAA that forbids it, then why not? I trust Israeli security and if you have an israeli ID card you can be checked very very quickly.
An American AME friend was allowed to jumpseatin the cockpit from SFO to MUC last week but not allowed to do the same into the UK on his way home as our CAA forbids that despite the FAA permitting it.