Israel’s brutal war in Gaza has escalated into a “betrayal of humanity”, the United Nations’ humanitarian chief said Saturday. In a statement on the eve of the six-month anniversary of the war, Martin Griffiths, the outgoing under-secretary-general for humanitarian affairs and emergency relief, called for a “collective determination that there be a reckoning for this betrayal of humanity.” “Each day, this war claims more civilian victims,” said Griffiths, who will leave his post at the end of June due to health reasons. “Every second that it continues sows the seeds of a future so deeply obscu…