Yehuda Blum, Israel's former ambassador to the United Nations and a professor of law at Hebrew University of Jerusalem, commented: "The abuse and misuse of this concept of universal jurisdiction should be discontinued." Blum said the law was intended for use in cases with no clear jurisdiction, such as piracy in international waters, and should not be expanded for political aims. Israeli officials, acting under orders from Prime Minister Benjamin Netanyahu, told the British ambassador they expect quick action to change the law. Livni called the arrest warrant "an abuse of the British legal system". At a security conference in Israel, Livni did not directly address the arrest warrant but defended Israel's conduct during Operation Cast Lead, saying she "would make the same decisions all over again". "When the state of Israel has to do the right thing, it has to be done – condemnation or no condemnation, statements or no statements, arrest warrants or no arrest warrants. ... This is the role of leadership, and as far as I’m concerned I would repeat each and every decision."