They could either visit the Muslim country prior to Israel (Leg in Algeria, then Israel) so that doesn't become a big issue, or else not visit any Muslim countries (which has been done quite often). There would still be plenty of alternative options available.
And if there were to be a leg in Israel, I would definitely keep it by the coasts; either in Tel Aviv or by the Dead Sea would make for decent locations.
I would definitely say that there will be a trip to Australia/NZ this year; it seems to come every few seasons, now.