Argument: Hamas invited invasion by refusing to extend the ceasefire
"Israel's Gaza Defense". Wall Street Journal. December 29th, 2008 - "Even as Arab leaders have formally condemned Israel's attacks, they have also noted Hamas's escalation. Mr. Abbas yesterday said "We talked to them [Hamas] and we told them 'please, we ask you, do not end the truce. Let the truce continue and not stop' so that we could have avoided what happened."
Secretary of State Condoleezza Rice in a statement. - "The United States strongly condemns the repeated rocket and mortar attacks against Israel and holds Hamas responsible for breaking the cease-fire and for the renewal of violence in Gaza."
German Chancellor Angela Merkel and Israeli Prime Minister Ehud Olmert agreed in a telephone conversation in late 2008 that responsibility for the escalation lay "clearly and exclusively with Hamas. Hamas has unilaterally broken the ceasefire agreement."
"Israel's Gaza Defense". Wall Street Journal. December 29th, 2008 - "Hamas refused to extend the truce past December 19"
Harold Tanner, Chairman, and Malcolm Hoenlein, Executive Vice Chair of the Conference of Presidents. - We support the United States administration’s position that places the blame for Israel’s attack on Hamas and holds Hamas responsible for breaking the ceasefire and for the renewal of violence.