60% of Israelis already agree with the Clinton parameters (1967 border with land swaps). The reason they vote Likud is because they fear that if the IDF pull out of the West Bank, Hamas will use this territory to fire rockets on Israel. Boycotts and external pressure won't change anything to that, Israelis don't want to risk their lives to please anti-Zionist commies in in London or Stockholm. If you want Israelis to vote for the left, tell Hamas to stop calling for the destruction of Israel. You'll see, it will change a lot of things around.
Bomb-related incident reported in Ra'anana; suspect arrested (Haaretz)
from the article: Faust's bargain and the Israeli left