The murder of Shlomit Krigman and the wounding of another woman in Beit Horon on Monday could have been prevented if Israel had a more effective security fence, opposition leader Isaac Herzog said Wednesday.Writing on his official Facebook page, Herzog asked why Israel is not separating from the Palestinian Authority in a more effective manner and why it is not building a wall."What good is a fence if it can be climbed over or climbed under?" he said. "We don't need a fence for cattle, we need real separation that will prevent the entry of terrorists."Herzog suggested building an electric fence that would be more effective in protecting Israel's citizens."Any weaker solution would be abandonment on the part of the government," he said. "My separation plan would better protect the citizens from terror and murder."