ok you always get half of the candidates running not acknowledging palestine as a state because that half represents religiously radical groups, and they never get elected. All they can do is use their seats badly. But acyually, when you think about it, 50% of the groups running for power in Palestine don' recognize Israel as a state, so...
But yeah it's a major issue and it has to do with the way the knesset is set up. The Israeli constitution needs to be revised when it come to election