The Israeli electorate did not elect Ariel Sharon Prime Minister. There are no public elections for Prime Minister. We elect political parties, lists of people who become members of Keneset according their order on the list. the first on the list becomes Prime Minister, but it's up to the political party.
We don't elect people as individuals. We vote for platforms, party ideology. During Israel's last national elections the parties which got the most votes, or ideologies which got the most votes were in favor of Jews, Israelis, living in YESHA. The sum total of the votes to parties in favor of withdrawal was much less.
As they say in the old country: