Is it older than Israel?

The Bureij massacre, 1953

5 years in.

The State of Israel carried this out 5 years after its own declaration.

An example. Type anything above.

Unit 101 bombed huts of sleeping refugees in Bureij camp on 28 August 1953; the UN armistice commission counted 20 killed. UN Mixed Armistice Commission report, which called it “an appalling case of deliberate mass murder”