The low turnout isn't about politicians deceiving voters or there not being a choice. Low turnout affects many democracies nowadays and is the result of citizens not taking their civic duties seriously.
#2 if the government is in the hand of 'leftists' then maybe that it is the will of the majority. In fact I think the opposite - the system of elections to the Knesset gives so much power to religious parties that whatever party gets the most votes they have to tow the religious line and expand the settlements - even while trying to make peace with the Palestinians (eg Rabin, Peres, Barak)
But if you disagree with me then do something about it! Dont whinge about "democracy" - go elect someone who will make a democracy. If there is noone then run yourself. If people dont agree with you then think about how to make your argument better.
Voter apathy and cynicism are not the solutions!