You don't. Israel has been a theocracy from day one, but a theocracy with some of the trappings of democracy. All this guy is proposing is to eliminate the trappings and go with a pure theocracy. Although secular Israelis may have some misgivings about such a step, it is actually a very small step in Israel's case. The trappings of democracy have become thin and threadbare anyway.
Two seriously wounded in crime-related shooting in Netanya (Haaretz)